TMDb/Avengers: Doomsday Movie Avengers: Doomsday trailer rumors, Steve Rogers' Secret Wars role, and Ultron's shocking return. The MCU's next phase is here. April 21, 2026 AceShowbiz - The latest rumors swirling around the Marvel Cinematic Universe focus heavily on the upcoming Avengers: Doomsday. Fans are eagerly anticipating the release of its trailer, which is expected to reveal significant plot details and set the stage for the next big phase of the MCU. Another major point of speculation involves Steve Rogers, who is rumored to have a crucial role in the upcoming Secret Wars storyline.