In 2011 it was Thor and the upcoming Captain America: The First Avenger.
In 2013 it will be the superhero team-up The Avengers with no second release yet announced.
In 2013 we’ll get Iron Man 3 on May 3rd and Thor 2 later that Summer.
Walt Disney Pictures confirms.
The Avengers 2 is in the works as well as a Nick Fury film.
At the moment we have the following either released, pre-production, or planned:
The Incredible Hulk
Iron Man 2
Iron Man 3
Captain America 2
The Avengers 2
There are also talks about a HawkEye, Hulk 2, and some other minor character spinoffs.