Justice League of America - The 99 (1-6 series) Complete

And then he came to the aid of Batman - Gotham Guardian, Dzh'onn Dzh'onzz - Martian Manhunter, John Stewart - Green Lantern, Flash - The Fastest Man on Earth, Aquaman - Lord of sea space, Diana (aka Wonder Woman) - Princess Amazon Island Themyscira. Their headquarters was the Watchtower orbiting the Earth, built on money Batman.