You are cordially invited... Bruce Wayne and Selina Kyle are about to tie the knot, uniting two of Gotham's greatest vigilantes in the wedding of the century. But the city's deadliest villains are determined to crash the party, and only Batman and Catwoman's closest allies stand in their way! Robin vs. Ra's al Ghul: It's grandson versus grandfather as the son of the Bat faces the head of the Demon in a fatal family feud! Nightwing vs. Hush: Batman's original partner turned best man squares off against Bruce Wayne's oldest friend turned bitterest enemy! Batgirl vs. the Riddler: Two of Gotham City's greatest minds clash as the one-time Oracle and the overlord of Zero Year launch a war of wits! Red Hood vs. Anarky: Agents of chaos collide in a battle between the Dark Knight's rogue Robin and the underworld's most unpredictable mastermind! Harley Quinn vs. The Joker: Once upon a time, they too might have said, "I do." Now the Clown Prince of Crime and the Mistress of Mayhem are at each other's throats, with all nine of Catwoman's lives hanging in the balance!