I will say even though a city map sounds good on paper, the concept might never work since they would have to rework the entire predkour system for it to work as there would be no trees, most things would happen inside buildings making 4 fireteam members cramped up into small rooms with little breathing air for the predator so if all 4 would just aim at the entrance they would cook the predator in less then a few seconds and lets also not forget the city would be in theory have to be realistic unless its mostly back allyways and stuff like the slaughter house and drug houses but the predator would still have a huge disatvantage in these type of maps because of the tight spaces unless he can go ontop of rooftops as a save haven of sorts.