Elevated, yeah I think Batman will feel more sci-fi with his gadgets. More than Nolan's. I think Batman himself will feel more comic booky. Him existing in a world that has aliens, and super-heroes with super-powers. Yes. But im almost positive Affleck will be directing these movies, and his style is even grittier and down to earth than Nolan. I don't see monsters existing in that Gotham.
WB are obviously gonna try to continue Nolan's realistic style for at least the Batman movies after the success of the trilogy. General audiences have been responding more to that style. So they'll continue it for the solo films. They'll just elevate Batman as the world's greatest detective and as a fighter and gadget man (minus Lucius Fox) in order to tango with the likes of Superman and to make it different from Bale. Changing the voice is another thing.
Ill bet ANYTHING that WB and Affleck together will not care for Clayface, Killer Croc, Solomon Grundy, Mad Hatter, Poison Ivy or Man Bat. Mr Freeze is only a maybe if they figure out a way to use his suit in a logical way, which they can. But I don't see the studio trusting in Freeze just yet when there's other big rogues to do. Riddler, Penguin, Joker, etc will probably be the priority.