Marvel Studios’ major cast announcement has definitely supported one of my biggest theories for Avengers: Doomsday. Set to release in 2026, the fifth Avengers movie is set to feature a vast collection of MCU characters, and likely even more than the 27 who were confirmed during Marvel’s recent live stream event. That said, the characters we now know will be featured have led me to believe that Doomsday is set to tackle a lot more than just a battle with Robert Downey Jr.’s Doctor Doom.