Batman: Gotham Knight is a 2008 animated direct-to-DVD anthology film of six animated short films set in-between Batman Begins and The Dark Knight. Each short, or segments, are written by Josh Olson, David Goyer, Brian Azzarello, Greg Rucka, Jordan Goldberg and Alan Burnett.
Batman Gotham Knight - Official Trailer

Offical Batman : Gotham Knight Website

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This looks really cool. It’s a direct to DVD collection of 6 Batman stories, written by some of comic books best writers, and animated by some of the worlds top anime guys. The stories are set between Batman Begins, and The Dark Knight, and are designed to tie in with the release of the new movie later this year.