Yesterday we got the news that Joss Whedon was in talks with Marvel to direct The Avengers, however Variety have since mentioned that not only will Whedon be directing, he will also be re-writing the script.
Zak Penn (Elektra, X-Men 3) had been given the task of combing the worlds of Iron Man, Thor, Captain America and The Hulk in the form of a screenplay, which I imagine was quite a challenge considering we have yet to see Thor and Captain America on the big screen. Penn probably had directors Kenneth Branagh and Joe Johnston on speed dial so he could ask them about the characters, as there will need to be consistency between each film.
Many have said that Whedon is more of a writer than a director, so this should be good news for fans. Whedon has spent a lot of time writing comic books so he knows how to write superheros, and with input from other Marvel directors I expect the script to be nothing short of comic book movie excellence.
Whedon and the team have just over 9 months before The Avengers starts filming with Robert Downey Jr., Chris Evans, Chris Hemsworth, Samuel L. Jackson and (hopefully, possibly, maybe) Edward Norton as The Hulk.