Well, that didn't take long: Just the other day, a rumor began circulating that Arnold Schwarzenegger would re-team with Terminator director James Cameron to play a villain in Avatar 2, but now Fox has stepped in to throw water on that fire. According to The Hollywood Reporter, the studio said Schwarzenegger won't be in the movie and isn't even in talks for a role.
Then again, this is Hollywood, remember how Michael Bay wasn't going to direct Transformers 4 and Khan had nothing to do with Star Trek Into Darkness?
Cameron is looking to film Avatar 2, 3 and 4 all at the same time beginning next year, with an eye toward 2016, 2017 and 2018 December releases. Terminator: The Sarah Connor Chronicles writer Josh Friedman is working on 2 while Rick Jaffa and Amanda Silver (Rise of the Planet of the Apes) are teaming for Avatar 3, and Salinger's Shane Salerno is working on the fourth.