An alleged leak from Avengers: Doomsday has sent Marvel fans into overdrive, with footage seemingly showing Robert Downey Jr.'s Doctor Doom commanding Sentinels against the X-Men. Though unverified, the clip has fuelled speculation about mutants' role in the MCU's next major crossover event

The trailer of Avengers: Doomsday reveals Robert Downey Jr. as Doctor Doom, epic crossovers with X-Men and Fantastic Four, and the return of Steve Rogers, setting up a massive multiverse showdown