Huh, I dunno if anyone else knows this. But 2 live action movies is being developed for Gantz. It's set to be released in 2011. Old news? Not sure. Stars Kenichi Matsuyama, the same actor who played L in the Death Note movies.
"It is said that producers are aiming to make the film suitable for general audiences, which means that it may likely lack the violence of the original manga."
I just lost interest. Was feeling good about it too.