His story: His first appearance is an origin story in the first Iron Man (2008), where his kidnapping and injury lead him to create a reactor that keeps him alive and powers the suit. From there, he continued to fight against villains trying to kill him and/or various members of the public—specifically, Ivan Vanko in Iron Man 2 (2010) and Aldrich Killian in Iron Man 3 (2013). He also slowly develops a serious relationship with his assistant-turned-CEO of Stark Industries, Pepper Potts. In The Avengers, Stark helps to save the world from an invading alien army led by Loki, and in Avengers: Age Of Ultron, Stark helps to destroy a malevolent AI he unintentionally created, one he worked on after the events of the previous film left him feeling the need to create a greater safety net for the world. His last appearance was in Captain America: Civil War, where he drew up the Sokovia Accords, which place the Avengers under the control of the United Nations—a decision that fractured his friendship with Captain America.
Played by: Robert Downey Jr.
Currently, Iron Man is: Semi-retired, having left full-time Avengers work but still occasionally throwing on the suit to try and do some good.
Where will we see him next? In the upcoming Spider-Man: Homecoming, due July 5, 2017.