Marvel Studios is giving Avengers: Doomsday a massive year-long marketing campaign, as the first trailer will be attached to the biggest movie of the holiday season. Ever since Robert Downey Jr. was announced as Doctor Doom for Avengers: Doomsday at San Diego Comic-Con in July 2024, the anticipation for the MCU's latest film has grown exponentially. The first tease came in March 2025, in the now-infamous five-hour chair video that revealed the cast for Doomsday.