TMDb/Avengers: Doomsday Movie Robert Downey Jr. returns! The Avengers face their most complex villain yet and meet the X-Men in Avengers: Doomsday, the epic MCU multiverse event. April 17, 2026 AceShowbiz - The Marvel Cinematic Universe sent shockwaves through CinemaCon with the unveiling of the first full trailer for Avengers: Doomsday, marking the return of Robert Downey Jr. in a groundbreaking new role.