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First 'Avengers: Doomsday' Trailer Set to Premiere With 'Avatar: Fire and Ash' on Dec. 19

The theater-first debut reflects a coordinated Disney strategy to launch Marvel’s Phase 6 centerpiece.

Overview

  • Collider reports, citing multiple sources, that the teaser will be attached to Avatar: Fire and Ash screenings starting December 19, 2025.
  • Marvel is said to have multiple trailer cuts ready, the online release timing is not confirmed, and some insiders suggest select fans could see footage earlier.
  • The teaser would mark the first official glimpse of Robert Downey Jr. as Doctor Doom, with outlets reporting the villain will feature prominently in early marketing.
  • Avengers: Doomsday is scheduled to open on December 18, 2026, with Anthony and Joe Russo directing a multiversal ensemble that includes MCU veterans and X-Men and Fantastic Four stars.
  • Cast member Channing Tatum has been promoting the film’s scale and action in recent interviews, calling it potentially the biggest movie of the next decade.