I used TDKR Batman as the base, Blake head, Daredevil nunchuk holster... I sanded off the bat symbol, made a few fighting sticks and painted. I didn't want to change the suit much, I wanted this Nightwing to be a natural progression given the events of the movie. Anyway, I am happy with how he turned out.
Secondly: Throughout the entire trilogy one of the main themes is that the SYMBOL (BATman) is more important than the man. "I can be everlasting", "Not who I am underneath..." blah blah blah and about 50 other non-quotable references from TDKR because I only saw it once...but they were there.
Anyway, I'm pretty sure Nolan was suggesting (even by the "Robin" bit) that he would go on to be the natural successor as Batman...as Richard Grayson (ROBIN) was/is. It's Nolan's way of skimming over the whole "Robin" (green tights) angle while still acknowledging the heart of the character as a "young kid who tags along" and takes up the cowl.
I know people are going to argue me on this one and that's totally cool. Until the Bluray commentary I guess we'll just have to use our imaginations
I like the concept