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.

The Fantastic Four cast, Chris Hemsworth, Simu Liu, a bunch of X-Men, and more will battle Robert Downey Jr.'s Doctor Doom in Avengers 5. Marvel Reveals Avengers: Doomsday Cast, Including Patrick Stewart, Ian McKellen, Channing Tatum Ben Kaye

With the promise of an all-star cast led by Robert Downey Jr. as Doctor Doom and Infinity War and Endgame’s creative team back in action, the fifth Avengers movie could bring back much of the franchise’s lost spark.