X-Men and Fantastic Four in the MCU: Everything You Need to Know
X-Men and Fantastic Four in the MCU: Everything You Need to Know
Two franchises born at 20th Century Fox, separated from the MCU for over twenty years, coming together for the first time in Avengers: Doomsday. How did Patrick Stewart, Ian McKellen, and Pedro Pascal's Fantastic Four join the Marvel Studios universe? This deep dive covers the whole story, from film rights to their on-screen reunion.
- Two Universes, One Story
- The History of the X-Men
- Why the Absence
- The Fox Acquisition
- The Cast's Return
- The Fantastic Four's Entrance
- Who Are the Fantastic Four
- Doctor Doom, the Shared Enemy
- Comparison Table
- The Big Team-Up
- Shop
- FAQ
Two Universes, One Single Story
For a long time, comic book fans had to accept a frustrating reality: the X-Men and the Fantastic Four, two historic pillars of Marvel Comics, didn't belong to the same cinematic universe as the Avengers. The reason had nothing to do with storytelling — it was purely contractual. Back in the 1990s, Marvel, then in financial trouble, sold the adaptation rights to several of its most profitable properties to different studios just to survive. The X-Men and the Fantastic Four went to 20th Century Fox, Spider-Man to Sony, while Marvel Studios kept the rights to characters considered secondary at the time: Iron Man, Thor, Captain America. History would prove just how ironic that choice was.
This deep dive traces how these two franchises, long developed in parallel without ever crossing paths, ultimately joined the Marvel Cinematic Universe and are now preparing to face, alongside the Avengers, the biggest threat ever seen on screen: Doctor Doom.
Together, these two franchises represent a huge chunk of superhero box-office history: over $6 billion in combined worldwide box office for the X-Men films between 2000 and 2024, on top of the various Fantastic Four attempts. Their absence from the MCU for over a decade wasn't an editorial choice, but an industry constraint — which makes their integration all the more meaningful for fans who've followed the Marvel universe since its earliest days.
The History of the X-Men on Screen (2000-2024)
Launched in 2000 with Bryan Singer's X-Men, the franchise laid the groundwork for modern superhero cinema, years before the first Iron Man. Patrick Stewart and Ian McKellen already played Professor Xavier and Magneto, two roles they would carry for over twenty years across multiple films, prequels, and sometimes contradictory continuities.
| Film | Year | Key Milestone |
|---|---|---|
| X-Men | 2000 | First film, launches the franchise and modern superhero genre |
| X2 | 2003 | Widely seen as the high point of the original trilogy |
| X-Men: The Last Stand | 2006 | Controversial conclusion to the original trilogy |
| X-Men: First Class | 2011 | Reboot going back to the origins, set in the 1960s |
| X-Men: Days of Future Past | 2014 | Merges the two continuities (original and First Class) |
| Logan | 2017 | Hugh Jackman's bittersweet farewell as Wolverine |
| Dark Phoenix | 2019 | Final film of the Fox continuity, met with a very mixed critical reception |
| Deadpool & Wolverine | 2024 | First real bridge between the Fox universe and the MCU |
Twenty years of films, eight different actors in the role of Wolverine before Hugh Jackman became the definitive choice, and an internal continuity that's sometimes hard to follow: the Fox-era X-Men saga remains, despite its inconsistencies, one of the most influential superhero franchises of the 2000s and 2010s.
The franchise also gave rise to one of the most profitable spin-offs in superhero movie history: Deadpool (2016), which redefined what an R-rated superhero film could achieve at the box office. Its sequel, Deadpool 2 (2018), confirmed the commercial success of the formula, before Deadpool & Wolverine (2024) became the very first film in the franchise to officially join the MCU, paving the way for the big return of the classic X-Men cast.
The History of the Fantastic Four on Screen
Unlike the X-Men, the Fantastic Four never quite found their audience on the big screen before joining the MCU. Fox produced a first film in 2005 with Ioan Gruffudd, Jessica Alba, Chris Evans (before his role as Captain America), and Michael Chiklis, followed by a sequel in 2007, Fantastic Four: Rise of the Silver Surfer. Both films did reasonably well commercially but received a lukewarm critical response. A reboot attempt in 2015, directed by Josh Trank, turned into a fiasco: a chaotic shoot, studio statements publicly contradicting the director mid-promotion, and one of the worst critical and commercial receptions in recent superhero movie history. That failure largely explains why Marvel Studios chose to start completely from scratch with a full reboot rather than try to salvage a damaged franchise.
Why the X-Men and Fantastic Four Were Absent from the MCU
When Marvel Studios launched Iron Man in 2008, the company didn't own the rights to its most widely recognized characters. Studios holding those rights were contractually required to keep producing new films regularly, or risk losing the rights back to Marvel — which is why Fox kept churning out X-Men and Fantastic Four films, some of uneven quality, purely to hold onto its rights. The result: two separate Marvel universes coexisted on screen for fifteen years, each invisible in the other's films, despite sharing the same source comics publisher.
Disney's Acquisition of Fox (2019)
The turning point came on March 20, 2019: Disney completed its acquisition of 21st Century Fox for over $71 billion, a deal that included the film studios and, with them, the rights to the X-Men, the Fantastic Four, Deadpool, and Silver Surfer. For the first time since the 1990s, every Marvel character was back under one roof. It would still take Marvel Studios several years to weave these heroes into its continuity, between a full Fantastic Four reboot and the gradual return of the original X-Men cast.
Deadpool & Wolverine (2024) served as the launchpad for this merger, using the Multiverse concept to justify the appearance of character variants from different continuities without having to explain everything from scratch. That same multiversal logic, developed throughout the Multiverse Saga, is what now lets heroes from entirely separate film universes come together to face Doctor Doom.
The Return of the Original X-Men Cast
The biggest surprise for fans is the massive return of the actors from the 2000s X-Men trilogy, many of whom had been absent from Marvel screens for over a decade.
The founder of the X-Men, back again
Patrick Stewart reprises the role he's played since the very first X-Men in 2000. His return confirms the official integration of the former Fox franchise into Marvel Studios continuity, more than twenty years after he first took on the role of the Marvel universe's most powerful telepath.
Longtime rival, uneasy ally?
Professor X's longtime rival, Magneto is also joining the cast. It remains to be seen whether, faced with a threat as existential as Doctor Doom, the character will choose to fight alongside the Avengers or pursue his own agenda, staying true to the moral ambiguity that has always defined the franchise's most powerful mutant.
Channing Tatum — Gambit
After years of troubled development on his own solo film that never got a sequel, Channing Tatum finally brings Gambit to the screen.
James Marsden — Cyclops
Cyclops returns to the screen after a long absence following X-Men: The Last Stand, in which his character was killed off abruptly.
Rebecca Romijn — Mystique
Magneto's loyal ally, Mystique brings her shapeshifting powers to an already formidably powered cast.
Kelsey Grammer — Beast
A scientific genius as much as a formidable fighter, Beast rounds out a nearly fully reunited X-Men team for the occasion.
Alan Cumming, who played Nightcrawler in X2 back in 2003, completes this massive reunion of a cast that no one expected to see fully assembled again in a Marvel Studios film.
How the Fantastic Four Enter the MCU
Unlike the X-Men, the Fantastic Four didn't get a return of their original cast. Marvel Studios instead opted for a complete reboot with The Fantastic Four: First Steps, released in 2025, which sets the team in an alternate retro-futuristic world known in the comics as Earth-828. This aesthetic choice — a 1960s America reimagined with advanced technology — lets Marvel Studios tell a fresh origin story, free from direct comparisons to Fox's two previous attempts (2005 and 2015), both of which were poorly received by critics.
It's right at the end of First Steps that the reality of Earth-828 collides with the main MCU timeline, opening the door for the Fantastic Four to appear alongside the heroes audiences have known since Iron Man. Find the full details of this event in our complete timeline of MCU Phase 6.
Who Are the Fantastic Four?
The stretchy scientist
A scientific genius with the ability to stretch his body at will after exposure to cosmic radiation, Reed Richards is the team's intellectual leader and, according to the comics, Victor Von Doom's longtime rival. Find the full details of this historic rivalry on our page dedicated to Doctor Doom.
Vanessa Kirby — Sue Storm / Invisible Woman
Able to turn invisible and generate force fields, Sue Storm is often considered the most powerful member of the team in recent comics.
Joseph Quinn — Johnny Storm / Human Torch
Sue's younger brother, able to burst into flame and fly, Johnny Storm brings the energy and impulsiveness of the sibling duo.
Ebon Moss-Bachrach — Ben Grimm / The Thing
Turned into a superhumanly strong rock creature by the original accident, Ben Grimm remains the emotional heart of the team, torn between his strength and his appearance.
A Team of Scientist-Explorers
Unlike the Avengers, the Fantastic Four weren't born from a military program or a one-off accident, but from a space exploration mission gone wrong — a family DNA of explorers that sets them apart from every other hero in the MCU.
Doctor Doom, the Shared Enemy of Both Franchises
In the comics, Doctor Doom isn't an Avengers villain: he's first and foremost the archenemy of the Fantastic Four, going all the way back to their very first clashes in the 1960s. His arrival as the main antagonist of Avengers: Doomsday gives Marvel Studios a narrative reason for the Fantastic Four to stand alongside the Avengers: their fight becomes the whole universe's fight. To fully understand this character, his origins, and his connection to Robert Downey Jr., check out our full Doctor Doom deep dive.
The X-Men, on the other hand, have no established direct narrative link to Doctor Doom in the classic comics — their presence in Doomsday is explained more by the sheer scale of the multiversal threat than by a pre-existing rivalry, a convenient plot device that lets Marvel Studios gather as many heroes as possible without having to justify every single one individually.
Why This Crossover Is Historic
Mergers of distinct cinematic universes remain extremely rare in Hollywood, given how complex the contractual, financial, and creative stakes are. The closest precedent is the arrangement between Sony and Marvel Studios for Spider-Man, which let Tom Holland join the Avengers as early as Captain America: Civil War (2016) while remaining, on paper, a character belonging to a separate studio. But that deal only involved a single hero. The X-Men / Fantastic Four merger is on a completely different scale: it brings together two entire teams, nearly fifteen major characters, in a single film.
On the competing side, DC Studios has never had to deal with this kind of fragmentation: Warner Bros. has always held the full film rights to the DC Comics universe. The Marvel situation is therefore unique in superhero movie history, and Avengers: Doomsday represents the culmination of a rebuilding effort that began the moment the Fox acquisition was announced back in 2017.
One question remains open for the post-Doomsday era: will the X-Men and the Fantastic Four get their own solo MCU films once the Multiverse Saga wraps up with Avengers: Secret Wars? Nothing has been officially confirmed by Marvel Studios on this front, but the scale of investment made to bring these casts together leaves little doubt that more is coming down the line.
Comparison Table: Two Franchises, Two Paths
| Criteria | X-Men | Fantastic Four |
|---|---|---|
| First film | 2000 (Fox) | 2005 (Fox), 2025 (MCU) |
| Integration approach | Return of the original cast | Complete reboot, new cast |
| Number of films before the acquisition | 12 films | 3 films (2 Fox + 1 2015 reboot) |
| Setting of the last solo film | Contemporary New York (Deadpool & Wolverine) | Earth-828, 1960s retro-futurism |
| First shared Avengers film | Avengers: Doomsday (2026) | Avengers: Doomsday (2026) |
| Connection to Doctor Doom | No direct historical link | Archenemy since 1960s comics |
Which Films Should You Rewatch Before Doomsday?
With more than twenty years of films spread across two distinct franchises, it's hard to know where to start before Doomsday hits theaters. Here's a tight selection designed to cover the essentials without a full rewatch.
For a more complete watch order, covering every MCU phase and the essential Disney+ series, check out our MCU chronological order guide.
Avengers: Doomsday, the Big Team-Up
X-Men & Fantastic Four
Figures, posters, and apparel celebrating the two franchises finally joining the Avengers.
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Frequently Asked Questions
Why weren't the X-Men in the MCU before 2026?
The X-Men film rights belonged to 20th Century Fox since the 1990s, separately from Marvel Studios. It wasn't until Disney acquired Fox in 2019 that their integration into the MCU became possible.
Why do the Fantastic Four have a new cast while the X-Men kept the original one?
Marvel Studios took two different approaches: a complete reboot for the Fantastic Four via The Fantastic Four: First Steps, and a return of the original cast for the X-Men, capitalizing on audiences' attachment to Patrick Stewart and Ian McKellen in their iconic roles.
Is Doctor Doom an enemy of the X-Men or the Fantastic Four?
In the comics, Doctor Doom is historically the archenemy of the Fantastic Four, not the X-Men. His presence in Avengers: Doomsday as a shared threat brings the two franchises together under one antagonist.
Does Wolverine (Hugh Jackman) appear in Avengers: Doomsday?
The confirmed Doomsday cast focuses on the original X-Men lineup (Stewart, McKellen, Marsden, Romijn, Grammer, Tatum): check out our dedicated film page for the full cast and updates.
Do you need to have seen the old X-Men films to understand Doomsday?
No, but knowing the characters helps you appreciate the callbacks. The key thing to remember: these heroes come from a film universe that was historically separate and are coming together for the first time to face a shared threat.
Is The Fantastic Four: First Steps a full MCU film?
Yes, but it takes place on Earth-828, an alternate retro-futuristic reality, before it collides with the main MCU universe right at the end of the film.
Why did Marvel Studios reboot the Fantastic Four but not the X-Men?
The Fantastic Four's two previous film attempts (2005-2007 and 2015) were received too tepidly to justify a direct sequel. In contrast, the original X-Men trilogy and its cast carry strong goodwill among fans, which pushed Marvel Studios to build on the original actors rather than start over.
Will there be solo X-Men or Fantastic Four films in the MCU after Doomsday?
Nothing has been officially announced by Marvel Studios, but the massive investment made to bring these casts together for Avengers: Doomsday suggests more films are likely once the Multiverse Saga wraps up.
Explore the Whole Avengers Universe
- Avengers: Doomsday, everything you need to know
- Who Is Doctor Doom? Origin and Powers
- The MCU Chronological Order Guide
- The Infinity Gauntlet Explained
- Shop Avengers T-Shirts
- Shop Figures & Collectibles
Two franchises, two stories of film rights, one point of convergence: Avengers: Doomsday. The X-Men and Fantastic Four coming together in the MCU marks the culmination of a project Marvel Studios has been building toward since the Fox acquisition in 2019, and one of the moments fans have anticipated most since the studio's founding.