According to The Guardian, Cameron plans to write a novel based on the movie - not a novel of the movie, but a prequel that tells about the previous lives of the characters.
"It would be something that would lead up to telling the story of the movie, but it would go into much more depth about all the stories that we didn't have time to deal with – like the schoolhouse and Sigourney [Weaver's character] teaching at the schoolhouse; Jake on Earth and his backstory and how he came here; [the death of] Tommy, Jake's brother; and Colonel Quaritch, how he ended up there and all that…"Don’t get too excited. It’s not expected to publish until the end of this year. But…if it’s a success, Cameron may allow other authors to write about the world he created. According to Cameron:
There might be opportunities in publishing to tell some of the backstory, tell some of the earth war stories, what went on in Jake's life before the movie. And we'd have that lead up to the sequel that might take place on Pandora several years after our movie closed.In my opinion, he’ll have to find writers who can verbally create the world he brought to life on film. When I read one of these books, I want to see in my head the world and characters I saw on film. Nothing less. How about you?