Marvel Studios revealed at San Diego Comic-Con in July 2024 that Robert Downey Jr. will return to the Marvel Cinematic Universe as the supervillain Doctor Doom in the upcoming film Avengers: Doomsday. This announcement came after the success of Deadpool & Wolverine and replaces the previously planned Avengers: The Kang Dynasty. The news signals a shift in Marvel's Phase Six as it nears completion.
The Marvel Cinematic Universe has faced challenges in recent years, but the July 2024 San Diego Comic-Con brought renewed excitement. Following the box-office triumph of Deadpool & Wolverine, Marvel Studios announced the production of Avengers: Doomsday, stepping in as a replacement for Avengers: The Kang Dynasty. A major highlight was the return of Robert Downey Jr., who previously portrayed Iron Man, now taking on the role of the iconic supervillain Doctor Doom.
This development reflects Marvel's efforts to revitalize its slate amid mixed results in 2025. Films such as Captain America: Brave New World and the Ironheart series were described as disappointments, while Thunderbolts* and The Fantastic Four: First Steps marked a strong comeback with heroic storytelling. As Phase Six approaches its end, these announcements outline Marvel's plans through at least 2027, including projects like Spider-Man: Brand New Day.
The shift away from the Kang storyline underscores Marvel's adaptive strategy in response to audience feedback and production changes. Fans have expressed enthusiasm for Downey's reprisal in a villainous capacity, potentially reshaping the franchise's narrative direction.