Unless you see Batman himself doing some fantastical things like flying and having superpowers, they're not changing crap. They're simply placing Batman in a new setting with a new ensemble.
Absence of evidence is not evidence of absence. So who's to say there are no superpowered heroes in this Batman's world? Nolan? Fanboys?
I find it funny it's only now that a vocal minority of people consider Batman to be "above" the comic book universe, by refusing to acknowledge he's in a fictional world with superheroes. To the MASS PUBLIC and practically everyone in the comic book fandom, Batman has and always will be part of the same exact universe as the Justice League.
And what about his character would look out of place in a JL film? As far as I can see, it has absolutely nothing to do with it.