Cameron first announced he was going to adapt the manga series as far back as 2000, and had been steadily working on it for close to ten years before 'Avatar' stepped in and took him away from it. Long story short, Cameron had to hand off directing duties to Robert Rodriguez, but he's still staying on as executive producer.
The story is set in the 26th century with Christoph Waltz's character, Dr. Dyson Ido, discovering a half-destroyed cyborg with a brain fully intact and then decided to rebuild it - thus, giving it the name Alita. When the cyborg's activated, it becomes clear that she's not just your average cyborg - but a karate-trained cyborg who can kick the crap out of other cyborgs with relative ease.
It's crazy stuff, for sure, but you wouldn't expect any less from James Cameron or Robert Rodriguez. 'Alita: Battle Angel' arrives in Irish cinemas on December 26th.