Batman schtick is that he creates tech for his job. If he had a different environment, he’d just invent tech to support that environment. It would probably be something more reminiscent of ironman.
I heard one:
As useful as Spiderman in a field.
That’s funny but Spiderman is quite strong by himself. Absence of tall structures will only make traversal a pain for him, it won’t change his combat/field effectiveness.
Missed opportunity for the Alaskan Albino Batman, who during summer fights sneaky bears and jackals in 24 hour sunshine
In the comics, when he has to move around areas with few tall buildings, he usually rides on top of busses and cars.
He lives in Forest Hills. But like most in Queens, he commutes to Manhattan for work.
I think the old Batman live action comedy series handles this scenario.