Marvel's upcoming film "The Avengers" is a blockbuster in the making amd now will be directed by our boy, Mr. Joss Whedon, thank you very much! "The Avengers" will potentially star Robert Downey Jr. (as Iron Man), Chris Evans (Captain America), Hemsworth (Thor) and Samuel L. Jackson (Nick Fury). Edward Norton may also return as the Hulk. Variety says Whedon will also rework thee film's script. Release date is May 4, 2012.
So basically, nothing the dude's not used to. Congrats!
**Update** - Even though multiple people involved have commented on Whedon's involvement in The Avengers, nothing is confirmed as of yet. We'll keep you posted!