Rules of Engagement' part 1! As Batman's war on evil in Gotham City ramps up, he must rise to meet the threat of Lex Luthor's plans to move in on both Bruce Wayne's and Batman's turf!

In an Elseworld where Supergirl was raised by Wonder Woman and Batgirl is a vigilante who keeps Gotham City safe from villainy, there could never be two more different super-heroines. But when the love of Supergirl's life is kidnapped by the Joker, the champions of Gotham and Metropolis must form a reluctant partnership.

It's the Joker's world…we just die in it! It's another typical day in Gotham City. Superman, the world's most dangerous criminal, has burst free of his cell in Arkham Asylum. The only one who can track him down is the world's greatest hero, Bizarro. Their epic battle destroys property owned by the bald but brilliant billionaire Lois Lane…wait-what?! If Superman isn't crazy, that means the whole world has gone insane, and only one man can be responsible. Somehow Batman's greatest nemesis, the Joker, has received the power to reshape reality to his own mad whims. The world now is defined by chaos and death, and there is absolutely nothing anyone can do about it. It's impossible to defeat a god. Unfortunately, someone forgot to tell Superman. Armed with nothing more than his will, the Man of Steel will put an end to the reign of Emperor Joker…or die trying. Join Jeph Loeb (SUPERMAN/BATMAN), Joe Kelly (JLA), Ed McGuinness (SUPERMAN/BATMAN), Doug Mahnke (SUPERMAN/WONDER WOMAN), and others in a twisted world under the rule of Emperor Joker. Collects SUPERMAN #160-161, ADVENTURES OF SUPERMAN #582-583, SUPERMAN: MAN OF STEEL #104-105, ACTION COMICS #769-770 and EMPEROR JOKER #1!

Batman's home, Gotham City, is being transformed into a land resembling ancient Greece, lorded over by evil gods. And once the gods of war, discord, fear and terror combine their essences with those of the Joker, Scarecrow, and Poison Ivy, Batman finds himself in the need of help from Wonder Woman. But when the gods decide to merge with Batman as well, the Amazon princess finds that even the aid of Gotham's other protectors, Nightwing and Robin, as well as her own protégé, Wonder Girl, may not be enough to end this evil reign.

In part 4 of 'Enemies Among Us,' Batman's raid on Superman's Fortress of Solitude ends in disaster as more aliens join the madness that's gripped all the outworlder heroes! Justice Leaguers past and present unite as forces converge to destroy the World's Finest team—and the world!

After a quick origin recap of our world's finest heroes, a new, improved Metallo has come on his birthday to attack both Metropolis and Gotham, bringing the guardians of each city together for a monumental battle! Plus, Lex Luthor assembles a mysterious super-team assigned to 'help' the Man of Steel.

In this Elseworlds tale, the sorcerer known as the Dark Joker battles endlessly against the macabre creature known as the Bat-Man for the fate of all mankind.

Wayne Casinos towers over Gotham City, but even the bright lights can't keep the dark shadows from enveloping the city. When the Joker kidnaps the children of the city's District Attorney, the Batman takes the case. But the man under the mask may not be the Dark Knight we know!

The Man of Steel's greatest villains react to the biggest news to ever rock the DC Universe. Lex Luthor, Mongul, Toyman, The Joker, and more of the world's greatest villains must come to grips with how the world changes now that the truth has been revealed by Superman. Some of comics' most unique and creative voices unite to tell a story that changes all the rules.

A new criminal in town breaks one of the Gotham Rogues out of prison looking for a truly masterful criminal. And when the Joker is passed up, he doesn't take the gag lightly!