"I am Iron Man." With those words, billionaire genius Tony Stark changed the world and the Marvel Cinematic Universe took off at top speed, never looking back. Soon, heroes from the past, present, and outer-space would unite to protect Earth from all sorts of vile villainy - like evil A.I.s determined to wipe out humanity, Asgardian princes out to conquer and rule, diabolical Nazi plots that were hidden in plain sight, and alien madmen looking to decimate half of all life in the universe. With heroes ranging from super-spies to super-soldiers to space raccoons, the MCU has gifted us with some of the most memorable champions in movie history.