True, but Ghost in the Shell and Battle Angel Alita would also fit those parameters, and they had Steven Spielberg (GITS) and James Cameron (BAA) attached. Despite this, neither one is even close to happening.
The thing with
Star Blazers is that even though it's an untested property, it has enough in common with a lot of big, space films that it wouldn't have a problem finding an audience. And there's not really anything mature or graphic that would need to be changed or removed in order to cater to a large audience. It's pretty much good as is. The only issue would be adapting the content to film without rushing through or skipping important parts of the story.
Ghost in the Shell, however, is an entirely different matter altogether. Not only would it have to be really, really expensive to pull off a lot of the stuff that happens in the manga (a lot of the tech and cyberspace stuff), it also contains a lot of content you wouldn't be able to show unless it's R-rated (it can get pretty violent, not to mention some of the slight sexual, lesbian undertones with The Major). And taking Hollywood's mindset into account, expensive R-rated films are a no-no (sad, but true). By making it PG-13, you would have to remove a bunch of content that makes it what it is and give's it its edge. Not to mention the race issues, considering that it takes place in Japan with Japanese characters. If you whitewashed those suckers and placed them in America, people would probably cry foul.
It's pretty much one of those properties that you would have to get just right. Sadly, the climate in Hollywood just isn't right for a film like
Ghost in the Shell. Unless something really drastic happens that allows a film like that to become mainstream, I don't see it happening anytime soon.
As for the latter, well... I'd like to think of the
Avatar series as just one giant, expensive tech demo to prep for
Battle Angel.
