TMDb/Avengers: Doomsday Movie Heroes unite across eras against Doctor Doom. Ian McKellen joins the MCU as Magneto in this epic multiverse saga. Premieres December 2026. April 19, 2026 AceShowbiz - Avengers: Doomsday, directed by Joe Russo and Anthony Russo, is set to be a landmark film in the Marvel Cinematic Universe, uniting heroes from multiple eras against a formidable multiversal threat. The movie, scheduled for release on December 18, 2026, will introduce Ian McKellen as Magneto, marking a significant crossover as several actors from the early 2000s X-Men film series reprise their roles.