This information is from an article originally published by UGO. The article has since been removed. According to Beyond Hollywood this information is from Kevin Feige, Marvel's big wig.
From BeyondHollywood.com
“The Avengers”: Feige would like to see the Hulk show up, possibly as the movie’s central villain (or antagonist) that spurs the creation of the Avengers to face the threat. And since he signs the checks, I’m going to guess he’ll get his wish. Also, Zak Penn will begin his draft of the movie next week and work through the summer. Feige also confirms that Sam Jackson and Scarlett Johansson (who will be playing the Black Widow in “Iron Man 2″) have already been signed up for the movie.
To continue The Avengers goodness, here is some other information from Beyond Hollywood:
Jon Favreau (Iron Man 1&2 director) Interview:
“Yeah, definitely, definitely,” Favreau said in an interview at WonderCon in San Francisco on Feb. 23, where he unveiled new footage from his upcoming movie, which stars Robert Downey Jr.
Favreau added: “I don’t want to blow anything, and also I don’t honestly know where it’s all going to land. I know that there are sort things that have been discussed and tried and talked about. I know at the end of the day on the Horizon is The Avengers, and the idea is to have chapters of all of the characters that would contribute to being The Avengers. … Hopefully, we’re all going toward The Avengers.”
Favreau wouldn’t confirm the Fury/Jackson cameo in Iron Man. “I’m not going to talk about who’s in what, but for the fans, there’s definitely enough to keep you leaning forward and paying attention and stuff,” he said. “And your girlfriend’s not going to know what you’re so interested in in certain scenes. It’s just going to fly by for certain people. But I think we threw enough breadcrumbs around to reward you for giving a s–t.”
