I actually believe the rumors of a fourth Crisis story, as everything we do know that's going on in the next two years in Justice League would line up perfectly with such a scenario. Further I wouldn't be surprised if Bendis' big cosmic plans focusing on Superman in regards to the DCU at large may actually eventually tie in to what Snyder's doing in JL. Kinda like how what Hal will be doing on his own looks like its going to tie-in. It could all coalesce together in the end. That said, it likely will not result in a reboot of the main line. That's been steadfastly denied. I think the plot will more have to do with SAVING things as they are, as opposed to changing it. And utilizing the multiverse in a new way on top of that. But in any case, whatever it constitutes I highly doubt it will render Bendis's run moot or anything like that so I wouldn't worry about getting invested if it does call to you.