I’ve had a storyline in mind from the start — there are even scenes in Avatar that I kept in because they lead to the sequel,” Cameron said. “It just makes sense to think of it as a two or three film arc, in terms of the business plan. The CG plants and trees and creatures and the musculo-skeletal rigging of the main characters — that all takes an enormous amount of time to create. It’d be a waste not to use it again

No one knows what the sequel will be about or when we will see the second one but some of the characters are also hoping to make a comeback in the sequel