The multiverse is on the verge of collapsing, and there's a high chance that everything we know and love will be under Doctor Doom's reign. Avengers: Doomsday will mark the first big Marvel Cinematic Universe crossover since 2019 when audiences witnessed how Iron Man gave his life away to defeat Thanos and his forces. However, things will be slightly different this time around as Earth's Mightiest Heroes won't be alone when attempting to save the world. The official cast for Marvel's highly anticipated project revealed that other groups such as the Fantastic Four, the Thunderbolts, and the X-Men will have a key role to play, which has been a long time coming.

The Mutants especially have had a pretty complicated journey when it comes to joining the MCU. Initially, Fox held the rights to any live-action adaptations of the characters — which made it impossible for them to cross paths with the...