Gotham, who ran away from home, met Metropolis, who also ran away from home.
So the two quarreled.
Gotham: Obviously Batman is the most powerful, but Superman is not as powerful as Batman, okay?
Metropolis: You are talking nonsense! Superman is much more powerful than Batman!
Gotham: Our Batman is super rich! Believe it or not, I will buy you in minutes!
Metropolis: Batman wouldn't be that boring.
Gotham: I'll never come to your place again! I'm going to New York!
Metropolis:…
New York: Don't come, please! I have enough chaos here!
Concept: Gotham City with simple folk customs!