From Anime News Network:
The February 24 issue of Entertainment Weekly has an article on the next two James Cameron projects. The deal with Twentieth Century Fox was to do both projects, so that one wouldn't be done without the other."We couldn't do one unless we do both," says Cameron. "They use the same technology."
The technology that Cameron is speaking of is a brand-new high-definition 3-D. Cameron hopes to have at least 1,000 theaters capable of showing HD-3D by the time the movies are released, but fans shouldn't worry because there will be standard 2-D prints made.
According to the article Battle Angel is slated for a 2009 release.
And from AnimeNation:
Ain't It Cool News has reported that director James Cameron personally admitted that he's still undecided whether his next film project will be Battle Angel Alita or his original science fiction film Avatar. Both movies will be shot back-to-back using state of the art digital 3D cameras, and Cameron has stated that his Lightstorm Studio has already produced full 3D CG models of Alita that he's satisfied with. Cameron also confirmed again that he plans to make Battle Angel a movie trilogy.
Why I care: Because I love the Battle Angel Alita manga and pray to God that Cameron doesn't screw this up.