If manga starts getting picked up, I'll be stoked.
Berserk could be HUGE, absolutely epic, multiple trilogies.
I've heard death note was 'in the works' on and off, could be great.
Vampire hunter D, like drkaje mentioned, would be awesome. The list goes on and on and on, really...
Scarlett J UTTERLY miscast in ghost in the shell, though... Shoulda went with noomi rapace or Rooney Mara, IMO.
I only hope Hollywood can get the aesthetics right. Will be a huge challenge... a lot of us just don't seem to 'get' Japanese style, unfortunately. They did well with edge of tomorrow, which many people probably don't know was based on a Japanese novel.
I think the easiest will be stuff like berserk or monster, which already had a clear Western influence to begin with.