Reese's fellow cop mentioned Bludhaven! Yes! Can an appearance by Nightwing be far behind? Perhaps Dick Grayson comes to Gotham to visit his old stomping grounds, and he gets caught up with the Birds in some type of investigation?
Did anyone notice the homage to the 60's Batman series at the Metahuman club? In order to get in, you had to twist the Shakespeare bust to have the secret door open. This is similar to how Bruce and Dick got to the 60's Batcave via the Batpoles. As The Chief would say, a Lovely.
Why is it that Reese hadn't heard of Batman? Batman only disappeared seven years ago, and he was actively fighting crime up until his disappearance. And wasn't Batman's existence common knowledge to Gotham City police when Batman was fighting crime in Gotham City? There was even the bat-signal, which was a signal from the police (more specifically police commissioner Gordon), requesting Batman's assistance with criminal matters.