They may go there, actually. Then again, maybe not. If people can't handle non-sequential editing and short scenes of potential alternate futures I shudder to think what the Multiverse might do.
I do know one idea that Geoff Johns brought forth (that's still potentially on the table) is the Multiverse (several alternate realities that can intertwine). While that could be potential for a big mess, if designed right (by EVERYONE) it could work. You could even potentially make the movies and the Flash/Green Lantern/Legends of Tomorrow TV shows part of the same canon. Meaning, you COULD theoretically have different Barry Allens in separate Alternate Earths. DC has done this in their comics throughout history. The problem, though, is that every time it inevitably gets so muddy that they have to reboot the comic universe, too.