For years James Cameron was talking about directing this but instead he fell in love with the idea of doing 12 sequels to Dancing with Smurfs so now Robert Rodriguez will be helming Alita: Battle Angel with Cameron on screenplay and producer duties.
According to Screen Anarchy none other than Marko Zaror has joined the movie and will be playing a character called Ajakutty. No other details on his role as yet but Rosa Salazar stars as Alita, with Christoph Waltz (as the cybernetics doctor), Mahershala Ali and Ed Skrein leading the cast.
The manga apparently followed a cyborg who has lost nearly all memories. Known as Alita, the cyborg is rebuilt by a cybernetics doctor. She remembers only one thing: that she was trained by a legendary martial artist/cyborg known as Panzer Kunst. So she becomes a bounty hunter and searches for her elusive past.
Source: Screen Anarchy