iesb.net broke the news via an interview with Samuel L. Jackson. He gave details into the Avengers movie: it's start date, the new director (Joss Whedon), cameos, etc. Just in time for the 2012 release date.
Jackson mentioned he will NOT be in Thor, but WILL be in The First Avenger: Captain America. Jackson also comments on how the Avengers will be the launch pad for his character of "Nick Fury".
Thus far it's been recorded cameo here and there (Iron Man 1 and 2). Jackson signed a 9 picture deal, so I can see how he's going to be in a bunch of the Marvel Universe. Speaking of the Marvel Universe; do you think they've done a good job keeping all the characters in the same "world"? Let us know what you think.