Joining Robert Downey Jr’s Iron Man and his SHIELD crew (Scarlett Johansson, Samuel L. Jackson, Clark Gregg) are a newly cast Mark Ruffalo as The Hulk, Jeremy Renner as Hawkeye, Chris Evans as Captain America and Chris Hemsworth as Thor. Buffy and Firefly/Serenity creator Joss Whelden is on directing duties.
The Avengers is scheduled for release in summer 2012, following the introduction of Thor and Captain America in their own stand-alone films, due in 2011.