Marvel took a pretty unusual approach to unveiling the cast of Avengers: Doomsday, and confirming that production is underway. After a series of chairs were revealed one by one on a five-hour livestream,

Robert Downey Jr. returns to the MCU with other confirmed actors including stars Chris Hemsworth and Tom Hiddleston, 'X-Men' stars like Patrick Stewart and Ian McKellen, and a good chunk from the studio's 'Thunderbolts.

Avengers: Doomsday' has announced its star-studded cast, which includes some iconic superheroes (and shocking old ones) reprising their roles