Chris Evans' Steve Rogers was the moral center of the MCU for a decade and arguably its purest example of heroism. His story got a fitting ending in Avengers: Endgame as well, which revealed him as one of the few people worthy enough to wield Mjolnir, showed him leading the fight against Thanos and taking the Infinity Stones back to their home dimensions. We last saw him settling into a well-deserved retirement with Peggy Carter, but now rumors are building of him appearing in Captain America 4.