The Marvel Cinematic Universe (MCU) detonated a multiversal bombshell on Tuesday when the first trailer for Avengers: Doomsday premiered during a star-studded Disney+ live event, unleashing a 2-minute-52-second spectacle that teases the franchise’s most colossal clash yet: a reality-rending showdown between a fractured alliance of Earth’s Mightiest Heroes and the tyrannical Doctor Doom,