Marvel Studios has confirmed that Avengers: Doomsday will be the largest crossover event in cinematic history. Kevin Feige revealed that almost every active hero in the MCU will return to face Robert Downey Jr.’s Doctor Doom. The film is being positioned as a darker, high stakes epic that will set the stage for the upcoming Secret Wars.

To manage the massive cast, Marvel is using multiple filming units across several continents. The story will heavily involve the Multiverse, serving as a "soft reboot" to streamline the franchise's complex narrative. Fans are particularly excited to see Downey Jr. transition from the MCU's greatest hero to its most formidable villain.