We're reaching a critical point in the Marvel Cinematic Universe right now. All of these movies are rapidly building toward the climactic showdown between Earth's heroes and Thanos in Avengers: Infinity War. But even as exciting as that prospect is, we can't help but wonder what comes next. Thanos may be the end-game of Phase 3 of the MCU, but there will be plenty more movies to come, and many more villains for the Avengers to contend with.