There's nothing wrong with making up words
The thing that struck me was when the Bludhaven Apartments (or some other Bludhaven thing) appeared on screen. IIUC Nightwing defends the town/city(?) of Bludhaven. So I immediately started wondering if he might put in an appearance in the series. IIUC(2) we'll never see a young Batman in any series (movie contracts prohibiting it) but maybe the character of Nightwing isn't tied up in such .... thingies (for want of a better word).
- though maybe I'm just reading too much into that sign, and possibly read the sign wrong.