Phase One

Phase One, also known as Avengers Assembled, is the first part of the Marvel Cinematic Universe and the first part of the Infinity Saga. From 2008 to 2012, the Phase One films grossed $3,811,244,484 worldwide.

Overview
The first set of movies introduces the main universe in which the films are set, as well as core characters such as Iron Man, Captain America, Thor, Hulk, Black Widow, Hawkeye, Nick Fury and War Machine, and organizations such as S.H.I.E.L.D. and HYDRA. Many of the films in Phase One focus on the Tesseract, an extraterrestrial artifact that is later established to contain one of the six Infinity Stones. The final film, The Avengers, involves the villains Loki and Thanos allying to steal the Tesseract and conquer Earth, leading to the formation of the Avengers.

Iron Man (2008)
2008's Iron Man tells the story of Tony Stark, a billionaire industrialist and genius inventor who is kidnapped and forced to build a devastating weapon. Instead, using his intelligence and ingenuity, Tony builds a high-tech suit of armor and escapes captivity. When he uncovers a nefarious plot with global implications, he dons his powerful armor and vows to protect the world as Iron Man.

The Incredible Hulk (2008)
In this new beginning, scientist Bruce Banner desperately hunts for a cure to the gamma radiation that poisoned his cells and unleashes the unbridled force of rage within him: the Hulk. Living in the shadows--cut off from a life he knew and the woman he loves, Betty Ross--Banner struggles to avoid the obsessive pursuit of his nemesis, General Thunderbolt Ross and the military machinery that seeks to capture him and brutally exploit his power. As all three grapple with the secrets that led to the Hulk's creation, they are confronted with a monstrous new adversary known as the Abomination, whose destructive strength exceeds even the Hulk's own. One scientist must make an agonizing final choice: accept a peaceful life as Bruce Banner or find heroism in the creature he holds inside--The Incredible Hulk.

Iron Man 2 (2010)
With the world now aware that he is Iron Man, billionaire inventor Tony Stark faces pressure from all sides to share his technology with the military. He is reluctant to divulge the secrets of his armored suit, fearing the information will fall into the wrong hands. With Pepper Potts and "Rhodey" Rhodes by his side, Tony must forge new alliances and confront a powerful new enemy.

Thor (2011)
As the son of Odin, king of the Norse gods, Thor will soon inherit the throne of Asgard from his aging father. However, on the day that he is to be crowned, Thor reacts with brutality when the gods' enemies, the Frost Giants, enter the palace in violation of their treaty. As punishment, Odin banishes Thor to Earth. While Loki, Thor's brother, plots mischief in Asgard, Thor, now stripped of his powers, faces his greatest threat.

Captain America: The First Avenger (2011)
Marvel's Captain America: The First Avenger focuses on the early days of the Marvel Universe when Steve Rogers volunteers to participate in an experimental program that turns him into the Super Soldier known as Captain America.

The Avengers (2012)
Marvel Studios presents in association with Paramount Pictures "Marvel's The Avengers" — the superhero team-up of a lifetime, featuring iconic Marvel superheroes Iron Man, the Incredible Hulk, Thor, Captain America, Hawkeye, and Black Widow. When an unexpected enemy emerges that threatens global safety and security, Nick Fury, Director of the international peacekeeping agency known as S.H.I.E.L.D., finds himself in need of a team to pull the world back from the brink of disaster. Spanning the globe, a daring recruitment effort begins.