Yesterday we got a bit of an update on the long-promised sequels to writer/director James Cameron’s 2009 film Avatar, but it turns out there’s much more to the story. Cameron has been working on two follow-up films to the sci-fi pic over the last four years, with an eye towards filming both Avatar 2 and 3 at the same time and then releasing the sequels a year apart. While last we heard Cameron was holed up in New Zealand finalizing the scripts for the sequels, news broke yesterday that Terminator: The Sarah Connor Chronicles creator Josh Friedman had been enlisted to pitch in on the screenplay for Avatar 2. It just so happens that this was only one third of the story, as Fox announced today that Cameron has actually enlisted the help of four screenwriters to collaborate with him on the screenplays for not only Avatar 2 and 3, but also Avatar 4, with the first sequel poised to hit theaters (finally) in December 2016. Hit the jump for much more.