James Cameron had tentative plans to press ahead sooner (rather than later) with an adaptation of the popular Battle Angel Alita franchise. That sci-fi series originated as a Japanese comic book/manga created by Yukito Kishiro back in 1990, eventually spawning anime and video game spinoffs, along with a prequel manga series titled Ashen Victor (among other related products).
2017 seems reasonable for Battle Angel, with the two Avatar sequels reportedly scheduled for release around December 2015 and 2016, respectively. This is huge news as many of his projects have been sliding from the back burner to the shelves over and over.
Source: Marketsaw