what's the problem man? Selina is what 13/14 and Bruce is 12. Doesn't make any difference.

If you were to include Harvey Dent, how will you do it? Bruce's schoolmate who's showing early signs of insanity?
I wanna see young Roman Sionis
We've had Bruno Heller openly saying that Harvey Dent will be closer in age to Gordon than to Bruce.
Anyone think we'll see flashbacks to Renee and Barbara's time together? They weren't lovers in the comics were they? I thought Montoya was involved with the Batwoman or someone like that.
Geez... They aren't planning this thing out like our most intimate fantasy. They in no way plan, or perhaps even hope that this thing runs for ten years. Name me a program that lasted for 10 years that didn't see a drop in quality by at least the 5th to 7th season? We're not sure if it'll get past season one really. And I'm guessing we won't actually be seeing much of little Bruce, so if we get to a point where the character is old enough to do something interesting, I'm sure they will re-cast if they so choose too.