Captain America 4 Is Introducing a Crucial Piece of X-Men Lore to the MCU

Giancarlo Esposito‘s recently revealed villain, Sidewinder, will be terrorizing Sam Wilson (Anthony Mackie) in Captain America: Brave New World, and the character already appears to have a long future in the MCU. When Esposito was first cast in the film, his role was kept a tightly guarded secret. Fans flooded social media to guess and debate who Esposito is playing in the film. However, the actor’s villainous role was announced at this year’s San Diego Comic-Con, where Esposito accidentally revealed the lifespan of his villain in the MCU.