5. The Battle of New York In 'The Avengers' (2012)
Phase 1 of the MCU culminated in "The Avengers," the first movie to bring together Iron Man, Black Widow, Captain America, Thor, Hulk, and Hawkeye in one place. The results were electrifying, with Joss Whedon's energetic script fueling a terrific team dynamic. Plus, the final battle in New York remains one of the most thrilling sequences in the MCU. All this, plus Mark Ruffalo's Hulk instantly made us forget every incarnation that had come before.