JGL As Batman In The Justice League Movie? I Didn't Know Satan's Vagina Was in the Rumormongering Business
First of all, JGL isn't Batman. HE'S ROBIN. That's the whole thing with that ending. (I would also accept Nightwing, even though that's technically Dick Grayson and John Blake is no acrobatic orphan.) But not Batman.
Reason B that this won't work? Nolan's trilogy doesn't really play well with all of the other characters. As much as you have to stretch the term "rooted in reality" when it applies to a city full of criminals that play dress up and a savior dressed as a bat, this kind of thing is difficult to translate to other heroes. For instance, let's say, EVERYONE ELSE IN THE JUSTICE LEAGUE since they have super powers and Batman is just a gottdamned badass.
Until DC properties that aren't Batman prove that they can rock your ass like Marvel, I am not excited about this Justice League movie. I hope this JGL rumor is either a way to rouse interest in the project or it means there is a solid script and capable director.
I vote the former.