all superhero games should be sandbox that's the point of being a superhero is roaming around doing cool shyt. Asylum was a bunch of small rooms, arkham city was basically one big outdoor room, lifeless city, take out the groups of criminals standing in preset areas and the random preset "save this prisoner" side missions and there is nothing going on in the city lol. Literally nothing happening. Those terrible gargoyle statues which u are forced ot use and they just look corny bc ur sitting like 20 feet above 10 dudes heads and they can't see you
at least if you are going to make the game small and closed in make it like splinter cell where darkness matters and movement is more real