TMDb/Avengers: Doomsday Movie Avengers: Doomsday sets up Doctor Doom as the MCU's deadliest villain yet-but why such a subtle introduction? Discover the strategy behind the silence. May 7, 2026 AceShowbiz - Avengers: Doomsday is gearing up to introduce what many believe will be the most formidable villain in the Marvel Cinematic Universe (MCU) to date: Doctor Doom. Despite being one of Marvel's most iconic and complex characters in the comics, the MCU has taken a surprisingly cautious and minimal approach to his introduction so far.