9. Bruce Wayne in Metropolis
Out of all the DC heroes it'd be possible to reference in the Man of Steel movie, surely the Bat himself would be by far the most pleasing. Any reference to Batman and Superman sharing the same world would, without a doubt, set fan interest ablaze faster than if it had been doused with petrol and introduced to a naked flame. You could reference Bruce Wayne, and by extension Batman, in many ways, but heres the least disruptive to the current script: Clark Kent works at the Daily Planet right? How about Perry White, as he deals out assignments to his staff, indicated that he needs someone to cover Bruce Waynes business-related visit to Metropolis? Simples. To push it, they could even have Clark Kent picking up this assignment, leading to an interview between two characters who we all know will go on to become brothers-in-superarms. Maybe thats too much to ask for, but for the fans, thisd be an event for the ages, guaranteed.