I hope that's not the case. We get overlapping Batmen (not that I don't like Batman), but Green Lantern gets one movie over a decade ago and is only now being brought back (as a streaming show, ugh), Flash finally gets a movie only to have it derailed by the star being a crazy person, and Wonder Woman gets one good movie before getting benched.
I'm all for using lesser known or more obscure properties, but it's hard for me to get too excited for the new DCU if most of the main League (including some of my favorites) aren't going to be involved and it's going to basically be the zillionth reboots of Superman and Batman mixed with a bunch of d-list characters.