I don't think they'll reboot TOS on CBS-AA. They pretty much already have rebooted Trek, but they'll always call it "prime universe" for marketing reasons. All that said, a start-from-scratch (and I mean real scratch, ditching all continuity and 60's scifi tropes of Kelvin/Disco Trek) TOS reboot is what I'd personally like to see most.
I always thought Bryan Singer's Federation 3000 was too fanwanky to ever be made, but seeing how CBS Trek thrives on fanwank (not that it's a bad thing for us fans, I'm just surprised they're aiming so hard for existing fans instead of going as broad as possible), I would guess it be most plausible.
I don't think any of those old series pitches is likely to ever be revived though. They're more than happy to create new show concepts in-house. The one I'm most looking forward to is Starfleet Academy, which I'm hoping is basically Smallville/Buffy Trek, and brings back some of that ST'09 energy.