A quote from the source:
The graphic novel surrounds a ronin warrior from 13th centruy Japan who gets sent into a futuristic New York. The story is actually better than “300,” though Miller’s art wasn’t as stylized or polished as it was in the Spartan epic, so this could be a damn good film…especially with Miller on board as an executive producer. Word is the same green-screen laden effects used in “300″ will be employed. Innnteresting.
Seems like a no brainer for the suddenly hot Frank Miller.