I'm probably alone on this but I don't even want to see the JLA movie. Not because I don't like the group, I do, but I don't want to see a Batman franchised tied to an overall universe. A reference or nod here and there is nice but Batman is a character I feel works best without the league and is a franchise that can be rebooted the most (not too close together, I just mean since there are so many tones and ways to take it). We have the gothic Burton series, the campy Schumacher series, the more grounded Nolan series and now maybe we can have a more fantastical take under a director like Rian Johnson, after you could have a series that mixes the science-fiction aspects and the more grounded aspects, and so on and so on. I'm going to be quite disappointed if they reboot Batman with the JLA as it means the franchise will be tied down to a shared universe.
On the topic of directors, I hope we get someone like Rian Johnson (Brick, The Brothers Bloom, Looper), Darren Aronofsky (Requiem for a Dream, Pi, Black Swan), Ben Affleck (as long as he doesn't cast himself as Batman or any other character he doesn't fit) (Gone Baby Gone, The Town, Argo), Doug Liman (The Bourne Identity, The Bourne Supremacy, The Bourne Ultimatum), Sam Mendes (American Beauty, Road to Perdition, Skyfall) or David Fincher (Se7en, Fight Club, The Girl with the Dragon Tattoo)