Because Gotham would be in ruins, if Batman was never came to be.
Batman The Brave and the Bold - 2008 Game Over for Owlman 1-13 was released on: USA: 6 March 2009
Batman fights in his hometown of Gotham
Batman lives in Gotham City.
Batman & Robin
Gotham city
Gotham city.
Batman Protects and defends his hometown of Gotham.
Gotham .
Gotham City.
Gotham City (its not a real city)!!!!
Gotham City