Collection: World's Finest #50

"It all started with the idea of bridging the modern-day Justice League Unlimited book and the not-too-distant past of Batman/Superman: World’s Finest for the first time in a big way," Waid says. "We wanted to do something special—something that would set up major DCU storylines for the year—so we came up with a cross-time adventure where the Legion of Doom from the past makes their way into the present, forcing our heroes to deal with the consequences of their arrival."