The first MCU film is Iron Man (2008), which began the films of Phase One culminating in the crossover film The Avengers (2012). Phase Two began with Iron Man 3 (2013) and concluded with Ant-Man (2015). Phase Three began with Captain America: Civil War (2016) and concluded with Spider-Man: Far From Home (2019). The first three phases in the franchise are collectively known as "The Infinity Saga". The films of Phase Four began with Black Widow (2021).
After the events of Avengers: Endgame, Dr. Stephen Strange's continuing research on the Time Stone is hindered by a friend-turned-enemy, resulting in Strange unleashing unspeakable evil.
When Tony Stark tries to jump-start a dormant peacekeeping program, things go awry and Earth’s Mightiest Heroes, including Iron Man, Captain America, Thor, Hulk, Black Widow, and Hawkeye, along with support from Nick Fury and Maria Hill are put to the ultimate test as the fate of the planet hangs in the balance.
Guardians of the Galaxy expands the Marvel Cinematic Universe into the cosmos, where brash adventurer Peter Quill finds himself the object of an unrelenting bounty hunt after stealing a mysterious orb coveted by Ronan, a powerful villain with ambitions that threaten the entire universe.