What we know about Avengers: Doomsday is limited, but fans are hyped to see mutants back on the big screen. A rumor from Cosmic Circus claims that the X-Men will be wearing brightly colored costumes, which are more accurate to the comics and cartoons. Scooper Alex Perez writes:

We have a rumoured list of actors who will return in Avengers: Doomsday next December, along with details on the costumes that the X-Men will don when they cross paths with Earth's Mightiest

Several X-Men characters are also coming back for the upcoming movie, including Patrick Stewart‘s Charles Xavier, Ian McKellen‘s Magneto, Alan Cumming‘s Nightcrawler, Rebecca Romijn‘s Mystique, James Marsden‘s Cyclops, and Channing Tatum‘s Gambit. Avengers: Doomsday is slated to release in theaters on December 18, 2026.