Avengers: Doomsday, scheduled to release on December 18th of 2026, is already generating massive amounts of anticipation as Marvel’s most ambitious project in the Marvel Cinematic Universe since Avengers: Endgame. While Marvel Studios has yet to confirm or release any official plot details, the casting choices, recent story arcs, and multiversal hints provide plenty of clues about the direction the film may take.
One of the most notable aspects of Doomsday so far is its sprawling cast, featuring a blend of established MCU characters, some newcomers from recent movies such as The New Avengers/Thunderbolts and Fantastic Four: First Steps, as well as the shocking return of actors from the Fox X-Men universe. This collision of multiple universes implies a heavily multiverse-focused narrative, where different realities collide and major players from across the Marvel Universe get to team up.
Recently, Fantastic Four: First Steps introduced the MCU’s version of Marvel’s First Family, as well as two crucial characters: Franklin Richards and Doctor Doom. Franklin, the son of Reed Richards and Sue Storm, is a cosmic-level powerhouse in the comics, capable of bending realities and reshaping entire universes. Though portrayed as a baby in the movie, his mere presence in the MCU suggests huge implications for the future, especially if his powers become a focal point in the plot of Avengers: Doomsday.
Doctor Doom, introduced in a very brief appearance in a Fantastic Four: First Steps post-credit scene, is one of Marvel’s most iconic villains. Known for his near-unmatched intelligence, mastery of both science and sorcery, and deep personal connection to the Fantastic Four, DOom’s entrance into the MCU is a long-awaited event. His interest in Franklin Richards during the post-credits scene hints at darker intentions, likely contributing to a major part of his plan in Doomsday. Given Doom’s reputation for manipulating cosmic forces to fulfill his goals, it is both entirely plausible and likely that the plot could center around him using Franklin’s powers to reshape reality or seize control of the multiverse itself.
The return of beloved legacy characters from the Fox-era X-Men universe adds another layer of excitement. Legendary Actors such as Patrick Stewart, Ian McKellen, and others are confirmed to be returning to reprise their roles, creating an amazing crossover moment that merges different cinematic timelines.
While Marvel remains tight-lipped about plot specifics, studio head Kevin Feige hinted at the scale of the in a behind-the-scenes interview done by Marvel.com.
“In the case of a movie that involves the threat of worlds literally colliding, it’s fun to see them visit each other’s homes. So with the Baxter Building set, let’s say it had four or five people in it at most in the Fantastic Four movie. And it’s got a heck of a lot more people in it [in Doomsday]. It’s a thrill to see that interaction.”
With its massive ensemble cast, the long-awaited arrival of Doctor Doom, and the unprecedented merging of multiple Marvel Universes, Avengers: Doomsday is shaping up to be a cinematic event that will redefine the future of the MCU. As fans eagerly await more details, one thing is clear: Marvel is pulling out all the stops to deliver a high-stakes, multiversal epic that lives up to the name Avengers: Doomsday.
