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:

Doomsday has received a brand new update, teasing the official introduction of the X-Men into the Marvel Cinematic Universe. The next Avengers movie is scheduled to make its debut on December 18, 2026,

Following conflicting reports about Ryan Reynolds' return as Wade Wilson in Avengers: Doomsday, a new rumour may shed some light on what we'll see from the Merc with a Mouth if he is indeed in the film.