All James Cameron has said so far is that "it's a love story set against the backdrop of intergalactic war". Cameron is doing his best to keep "Avatar" and "Battle Angel" shrouded in secrecy.
IMDb has this to say about "Avatar": In the future, Jake, a paraplegic war veteran, is brought to another planet, Pandora, which is inhabited by the Na'vi, a humanoid race with their own language and culture. Those from Earth find themselves at odds with each other and the local culture.
