Hmm. Just read an article that said Cameron is about to get knee-deep in writing and prepping Avatar 2 & 3... which won't premiere until 2014 and 2015. Seeing as how they barely managed to finish the visual effects in time for the first film (Cameron owes a HUGE thanks to Peter Jackson and WETA who stepped in at the last minute to finish the effects), I'm guessing Cameron is going to be booked solid until 2015. Make of it what you will.
Stepped in? I thought WETA did the majority of the film from the beginning.