Personally, I'm foreseeing a new Tranzit map each DLC, with more of the smaller maps, plus maybe an old fashioned, Black Ops style map if we're lucky. Because of this, Im gunning for Paris. Granted, we likely won't see the TranZit crew unless the Denizen Portals flub up and send them to Paris. But I see Paris as likely because of the fact they did plan a Paris map once, and there is that Paris board back in Der Riese. Plus double decker buses.
EDIT: Just got to thinking.... What if the Nav Cards were to control the Denizen Portals, thus sending the Tranzit gang to different locations, like PARIS. Just a thought, but I feel we will be seeing more from the Tranzit crew.