Too bad NBC didn't get it, they could have called in 'Law and Order: Gotham City'
"In Gotham City's criminal justice system, the people are represented by three separate yet equally important groups: Batman, who investigates crime; the police, who shine the Batsignal; and the district attorneys, who ineffectually prosecute the offenders and occasionally develop homicidal split personalities. Come to think of it, only Batman is really important."
I toyed with the idea of writing one of those intros in my original post, but I'm not that creative
As per the idea, I think it's a sound one, and can be really interesting. But I'm not really sure what they can do outside of having this be another procedural that just happens to be set in Gotham City.