The recent trailer for Marvel Studios' Avengers: Doomsday has ignited a discussion among fans regarding the introduction of Doctor Doom as the film's primary antagonist. While the trailer generated considerable excitement for the first Avengers film since Endgame, a segment of the audience has expressed concern that Doctor Doom's appearance feels underdeveloped, especially when compared to the methodical buildup given to Thanos.

Thanos, a character who eventually became the central threat of the Infinity Saga, had a presence in the Marvel Cinematic Universe spanning several years. His initial cameo in 2014's Guardians of the Galaxy preceded subsequent appearances in Avengers: Age of Ultron before he took center stage in Avengers: Infinity War and Avengers: Endgame. In contrast, Doctor Doom's primary antagonist role in Avengers: Doomsday follows a brief, menacing appearance at the end of The Fantastic Four: First Steps, leaving many fans feeling his introduction has been comparatively rushed.

This perceived haste has led some to speculate that Doctor Doom is a response to the shifting plans for Kang the Conqueror, suggesting Marvel Studios is implementing a last-minute strategy to establish a new major villain amidst declining interest in superhero content. However, this perspective is countered by arguments highlighting successful villain introductions throughout cinematic history that did not rely on extensive prior build-up. Examples cited include Darth Vader in Star Wars, Hannibal Lecter in The Silence of the Lambs, and even MCU's own Ultron, who was conceived and defeated within a single film.

Proponents of Doctor Doom's immediate prominence argue that the success of a villain hinges on the quality of the story, direction, and performances, rather than solely on the duration of their on-screen presence. The potential for Robert Downey Jr.'s portrayal of Doom to carry significant dramatic weight is seen as a factor that could overcome a lack of prior teases. Dismissing Avengers: Doomsday based on the absence of pre-release Doom appearances is considered premature by this viewpoint.

Furthermore, it is suggested that Avengers: Doomsday may serve as an initial setup for Doctor Doom, with his more significant role and conflicts potentially being reserved for the subsequent Secret Wars. The film's synopsis indicates that "Universes collide and the Multiverse Saga begins its final chapter," promising an "existential threat unlike anything they've ever encountered" and laying the groundwork for the future of the MCU. Avengers: Doomsday is scheduled for release on December 18, 2026.