I've wondered how Kentaro would look as Batman, and I think the end result came out well. Though, in all honestly, he'd be more akin to Absolute Batman (minus the axe) as opposed to most other versions. Though his attitude would probably be more akin to the versions in The Brave and the Bold, or the Adam West series.

Batman concept owned by DC Comics, and created by Bill Finger and more-or-less stolen by Bob Kane.