“Following the shock announcement that Robert Downey Jr. will play the MCU’s Doctor Doom, there are some essential aspects of Doom’s character which should be considered before Avengers: Doomsday. Doctor Doom, AKA Victor von Doom, is best known as an adversary to the Fantastic Four, but his villainous reach extends much further. Known for his genius intellect, mastery of both science and magic, and complex moral code, Doctor Doom is a fascinating Marvel character who has been long-awaited in the MCU timeline.”

Avengers: Doomsday is slated to arrive in theaters May 1, 2026. Secret Wars is slated for about a year later, on May 7, 2027. At SDCC, Marvel Studios also announced that the new Fantastic Four, long-time rivals of Doom, will be appearing in both Doomsday and Secret Wars as well.
Doctor Doom (Doctor Victor Von Doom) is a supervillain appearing in American comic books published by Marvel Comics. Created by Stan Lee, Jack Kirby, the character first appeared in The Fantastic Four #5 (July 1962). The monarch of the fictional nation of Latveria, Doom primarily serves as the archenemy of Reed Richards and the Fantastic Four.
Doctor Doom was ranked #4 by Wizardon its list of the 101 Greatest Villains of All Time and #3 on IGN’s list of the Top 100 Comic Book Villains of All Time. In a later article, IGN would declare Doom as Marvel’s greatest villain.