Marvel today released the theater dates for their upcoming movies.

Iron Man 2 - April 30, 2010
Thor - June 4, 2010

The interesting bit? The Avengers is a two-parter, but combined with Captain America.

The First Avenger: Captain America (that's what they're calling it) - May 6, 2011
The Avengers - July 2011


Yes, I'm gonna source myself