First, James Cameron discussed the fact that he is writing both scripts for Avatar 2 and Avatar 3 together, and that much of this next sequel will take place underwater. He also reveals that we will see new planets in these next two films in the franchise.
"It takes place on Pandora. I'm writing the second and third films together. It completes a three-film story arc. We will see the ocean of Pandora, which we haven't seen at all. That is an eco-system that I am dying to design. It's going to look spectacular. It narrows the spotlight. Instead of the rain forest or nature, it focuses on ocean issues. Because we have a planet that is a blue planet. If you look at it from a distance, earth is a lot more blue than it is brown...Than it is land mass. We are making the oceans unsurvivable for a lot of the species right now. For a lot of reasons. This is the chance to focus a little bit of energy in that direction. And there will be other planets as well, aside from Pandora. It will be a cornucopia. It will be a treat for the eyes."
James Cameron then gave his team of artists most of the created for the imaginative worlds that we will see on screen.
"I get to image things at a fuzzy level. Than I bring in a lot of great artists. They come up with all the amazing creatures and plants."
Finally, James Cameron let fans know that he will not be pushing the environmental aspects of the storyline any harder than he did in the original Avatar.
"This is a continuation of the same story at a greater level. I want people to feel that same sense of excitement about this world, and the fictional Na'vi people. I want them to feel that excitement of discovering a new world. All the things they haven't seen. The package of the first movie will be there. The themes will be there, and played out in a way that I think people can accept. I am not going to become more strident. I am not going to say, "Well, we got away with this much environmental content in the first one, now I am going to double it. I think that would be a mistake. It has to be entertainment first and foremost."