Sigourney Weaver hinted on the red carpet at the Golden Globes on Sunday night that she could return for a sequel. "I really can't say anything, but it's science fiction," she said. "Anything can happen."
More clues that Dr. Grace Augustine (Sigourney Weaver) may be back for the sequel... on the red carpet last night she said: "I'm not allowed to say anything," she repeated. "But if you look at the footage, I go somewhere, right?
Source: AVATAR blog