Slated for release on December 18, 2026, Marvel Studios’ Avenger: Doomsday makes continues the milestone in the Marvel Cinematic Universe by fully integrating X-Men into its main narrative. So far, we’ve seen the return of familiar mutants in Doctor Strange in the Multiverse of Madness, The Marvels, and Deadpool & Wolverine. This crossover film not only brings together iconic characters from previous X-Men films, but also sets the stage for future mutant-centric storylines within the MCU.
A historic X-Men reunion! Helmed by directors Anthony and Joe Russo, the event movie features the return of several beloved actors from the original X-Men theatrical series:
- Patrick Stewart as Professor X
- Ian McKellen as Magneto
- Kelsey Grammer as Beast
- James Marsden as Cyclops
- Rebecca Romijn as Mystique
- Alan Cumming as Nightcrawler
Additionally, Channing Tatum reprises his role as Gambit, following his well-received appearance in Deadpool & Wolverine.
The inclusion of the X-Men signifies an important expansion of the MCU’s scope. The film will explore the multiverse like never before, involving a confrontation between the X-Men and Avengers of Earth-Redacted, orchestrated by Doctor Victor Von Doom, portrayed by Robert Downey Jr.
The integration of X-Men into the MCU has been a gradual process since Disney acquired the rights of X-Men, Deadpool, and the Fantastic Four to Marvel Studios. This film will serve as the true first steps of this integration, bringing together characters from different universes into a major crossover storyline.
Avengers: Doomsday is poised to be a landmark film, not only by uniting a vast ensemble of superheroes but also by officially incorporating the X-Men into the main continuity. This integration opens the door for future storylines centered around mutants, setting the stage for Avengers: Secret Wars, scheduled for release on December 17, 2027, and the upcoming Untitled X-Men Film currently deep in development.
As the MCU continues to evolve, the inclusion of the X-Men promises to offer fans new and exciting adventures in the years to come.

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