Quote Originally Posted by 'upxare View Post
Mostly Pandora but the final battle (or any big event) on earth later, probably in Avatar 3
I'm pretty sure the humans are well and gone, and are not coming back, so earth would be out of the picture.

As for the setting of the second movie, and the third, it should be Pandora. Besides, the Na'vi don't even have the technology to travel to another moon (or even underwater).