I haven't watched the whole thing yet, and only quickly watched that segment (and the credits) with the commentary track on.
A couple of things to look for:
- Bruce Wayne as a young man who looks like a cross between Carroseur Doon from MADLAX and Orpheus from Meine Liebe... no, really...
- The special Bat-armor he's testing looks like something straight out of some sort of post-modern Gatchaman. No, really!
Anyway, I'll probably have the chance to watch more closely this weekend. Discussion in the Gotham Knight thread in the Bee Train Fan forum, of course.