'Avatar' sequels to film back-to-back?

James Cameron has revealed that he may shoot two Avatar sequels back-to-back.

The filmmaker told MTV that, although no contracts have been confirmed for a return to Pandora, he has already started to think about storylines for the follow-up to his record-breaking blockbuster.

He said: "Avatar 2... we're still working on deals. We don't start the movie until we get the deals worked out. I'm making notes. I'm not sitting idle."

On whether or not the sequels will film concurrently, Cameron said: "We're actually talking about that. That's not a decision yet. That is something that makes a lot of sense, given the nature of these productions, because we can bank all the [motion] capture and then go back and do cameras over a period of time."

The director added that live-action movies that shoot back-to-back suffered towards the latter stages due to a tired cast and crew.

"The way these back-to-back productions fall apart is that you're trying to do two live-action films back to back, and you're working on it for a year and a half, shooting," he explained. "Everyone is dead. It's not humanly possible. This type of film, it absolutely would work."