5. Multiple Protagonists - Bruce Wayne, Jim Gordon/GCPD & Gotham Citizens
Sure sure, Telltale have said the game is going to delve into "the mind of Bruce Wayne", but they'd really be missing a trick if they didn't also show guys like Jim Gordon hard at work too. The GCPD in general rarely gets a look-in, which understandably is hard thanks to them continually being shown up by the real star of the show - but that's precisely why it'd be so interesting. Think about it; would you rather play as the Bat yet again, or be the random cop on the job who comes up against him in an alleyway, following a major crime scene? Think of the choices, the ramifications of trying to take him in, talking to him, knowing the power of the force you're up against. These are all things that this sort of game can address, before letting you flip back and forth between each perspective to get the full picture on what's going on. The citizens of Gotham are never going to get their own game, but providing it didn't drag too much, they might just be perfectly suited for a third of this one.