Marvel Studios has unveiled an all-new trailer and poster of Avengers: Doomsday, giving fans a first glimpse of Robert Downey Jr. as he returns as Doctor Doom. The trailer also hints at the union of beloved heroes from three distinct universes

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