Maybe Rachel could get aged up in her solo?
Wally could get a solo book. He'll definitely appear in the current Flash series if he doesn't (Kid Flash and Chinese Flash also appear there). I can see Arsenal getting used in Green Arrow, maybe as a replacement member of Team Arrow for Red Arrow, who is joining the Teen Titans. Tempest and Aqualad could both show up in Aquaman. Donna's the real problem though. Has she EVER been a major part of the Wonder Woman series? And it's almost certainly limbo time for Omen and Bumblebee as well.