Avengers: Doomsday’s New York Comic-Con booth hinted at Doctor Doom’s past encounters with characters like Thanos and Ultron. Back when Jonathan Majors’ Kang the Conqueror was introduced in Ant-Man and The Wasp: Quantumania, the MCU made it clear that he had faced Variants of familiar Avengers before, and it seems his villainous replacement may be…