In the character bio section, Gruenwald explicitly labels Gotham City as being in New Jersey. (Gruenwald also listed Metropolis as being in Delaware in this issue, which has likewise been accepted ...

This map depicts Metropolis as a Manhattan-esque island, connected to the more rural mainland by a series of dams and bridges. Batman's Gotham City is infamous for having a sky-high crime rate ...

With Metropolis shrunk down to the fit inside a bottle, Harley Quinn decides to narrow the focus of it's latest episode.