According to Anime News Network, James Cameron plans on doing a Battle Angel Alita movie but only after he does the sequels to Avatar.
All of James Cameron films have been the cutting edge as well as the most visually fantastic movies with a great story line. Battle Angel Alita Anime would receive a huge reboot if Cameron decides to touch such a great Anime film and it would merge the one of he greatest Sci-Fi fanatic Directors with probably one of the most elite Anime’s in the world. A combination hybrid of pure delights.
Unfortunately we are looking at a few years before this may be possible assuming the Avatar sequels will recieve his attention much like the first.
We love Cameron for his work, we hate Cameron for the wait.