7. Explore Gotham City
Gotham City is a very impressive place. No wonder it's one of the most recognizable cities in fiction - so many things have happened in that place that I'm surprised it hasn't self-destroyed yet. It is an enormous place with tons of buildings and different zones are over there. And while we've been able to explore part of it in Arkham City - and apparently we'll be able to do it in the upcoming Arkham Origins - it would still be nice to explore the whole city. It could be with something like Google maps (y'know, you can chose either aerial view or just wander around) and you'll be able to decide where to go and explore freely, marking the places that were important in Batman's story showed in there with great detail and info on what happened there (for example, putting in the circus where The Joker held Gordon hostage during the events of The Killing Joke). With a place as big as Gotham City, with so many places in which important events happened this could be an incredible app for the fans of Batman, as well as those who are curious and want to know more about him. It would be very interesting to see Gotham City without having to worry about criminals or time limits or things like that.