The trailer for Avengers: Doomsday was unveiled at CinemaCon 2026, and while it hasn't been released publicly yet, early reports suggest it left the audience electrified. The event was attended by Robert Downey Jr and Chris Evans, who previously played Tony Stark (Iron Man) and Steve Rogers (Captain America), respectively, in the Marvel Cinematic Universe. However, while Evans is set to reprise his role as Captain America, RDJ will take on a strikingly different turn as the film's primary antagonist, Doctor Doom.