Gotham City teems with heroes as criminal masterminds from around the globe make their way to Batman's turf in one action-packed animated adventure after another. Drawn by Wayne Industries' technological advances, villains like Mirror Master, Lex Luthor and Count Vertigo bring their own brand of chaos. But with every evil newcomer, there is a Super Hero on the trail, and as Batman works side by side with heroes like Superman, The Flash and the Green Arrow, the roots of the Justice League grow.