Well, here is a weird rumor, that it actually might be true. According to Sigourney Weaver (via
Showbiz 411), director James Cameron is set to film not one, not two, but
three sequels to his highest-grossing film of all time,
Avatar. Released in 2009, the film became a worldwide hit, which of course means more sequels for the studio. Now, Cameron did say that he plans to dedicate all of his time to Avatar and Avatar only, which makes me think that this might happen. More below:
"Sigourney Weaver confirmed tonight that James Cameron is shooting “Avatar” 2, 3, and 4 all at the same time, all with her, and starting this fall. When “Political Animals” finishes shooting, see if you can follow Weaver’s schedule: she goes right into a new Christopher Durang play for a short run at Lincoln Center. Then she films “Avatar” 2, 3, and 4 with James Cameron. That’s right: they’re making three sequels to the blue 3D phenom all at the same time. Weaver says she has no idea how long it will take, or how it’s going to work. “I just show up,” she said."
For now, take it with a grain of salt, until we have some sort of confirmation. Sam Worthington, Zoe Saldana and Sigourney Weaver will return for the upcoming sequel.