1. Veteran Dark Knight
Casting Affleck, 41, in the role of Batman will allow for an "already established", "older", and "wiser" Dark Knight to be featured in the Man of Steel sequel, according to director Zack Snyder. Exactly how old, wise and established remains to be seen, but one can speculate he will already be wearing the bat-mask and possibly already be masquerading in the dark streets of Gotham. Whether as a recognized "hero" or merely an urban legend swooping down crime alley awaits to be known, however.
Since it was strongly rumored previously that Batman's next big-screen exploits would be heavily influenced by the Arkham Asylum video game series, one could hope to expect a Caped Crusader who has already tangled with some of his most dastardly villains, setting up a storied history to be referenced or flash-backed. One that perhaps intrepid reporter Clark Kent could be investigating, leading to their first encounter? Having a Dark Knight who has already been in action and is more of a "veteran" in Batman/Superman also brings up a question on the lips of many fanboys and fangirls: Will we see a Robin in this sequel to Man of Steel? Granted, the film is already crowded as is with both Superman's returning cast, Batman's essential family, in addition to at least a couple of villains makes for not too much room for much else. But, with a Batman already well into his career, could we see a call out to Nightwing, or perhaps another one of his young wards? Would it be too much to ask to meet Barbara Gordon, if only fleetingly, come July 2015? The possibilities that utilizing an experienced Batman bring with it to Man of Steel 2 allows for numerous chances to skip his well-known and dragged-out origin to dig into some of the meatier, less retreaded Batman lore for Affleck to portray. Rogues, insane asylums for the criminally insane, boy wonders, and oracles aside, this version of Batman could have Affleck giving us a grittier, more comic book-oriented Dark Knight than we have ever seen on film before.