Apparently DC wants the 10 Leaguers who "died" in Dark Crisis to semi-retire and not be part of the team but that still leaves quite a few prominent heroes(that aren't scheduled to be a part of another team) that could easily pull-off a Justice League until the aforementioned heroes decide to come back:
Apache Chief
Atom(Ray or Ryan)
Black Lightning
Dr. Light(Kimiyo)
Firestorm
Green Lantern(Jessica or Kyle)
John Constantine
Nubia
Shazam
Steel(John)
Vixen