When Superman pays a visit to Gotham City, Lex Luthor decides to recruit allies against the Man of Steel from among the criminal underworld, attracting Batman's interest.
Batman and Robin must oppose Superman, who is under Lex Luthor's mind control.
Green Arrow comes to Gotham... and accuses Bruce Wayne of poisoning children. It soon becomes clear that a villain is at work, and has plans to bring the entire city under his control.
Garfield Lynns, aka Firefly, inadvertently upgrades his powers and as Phosphorous, goes on a nuclear rampage.
Batman and Robin find themselves pitted against mirror duplicates, and soon realize they are fighting the Flash's arch-nemesis, the Mirror Master.
A wave of hysterical thieves heralds the return of the Joker as he collects their stolen loot and prepares to drop Gotham City into a gigantic sinkhole.
The villainous Sinestro attacks Green Lantern and attempts to capture his power ring, so the Emerald Warrior sends it to... Batman.
A computer accident forces the Joker's aberrant personality into a computer, letting him control the WayneTech nanobots and create the robot body. However, the "new" Joker has plans of his own.
A trio of college misfits and geeks decide to get revenge on their peers... by using a mutagen to transform into humanoid animals.
The Batman and Robin end up fighting their criminal counterparts, Wrath and Scorn.
When Black Mask and the Shadow Thief team up to rob the Gotham Gem Depository, their respective nemeses Batman and Hawkman must join forces to stop them.
Batman and Green Arrow discovered that the super-powered members of the Justice League have been disappearing one by one. The trail of disappearances leads to Hugo Strange... and his mysterious allies.
The Justice League must battle androids with all of their powers, as well as a new Joining invasion.