Gregory Helms, Brian Kentrick,Paul London, and sadly Teddy hart have all burned bridges with WWE I doubt they'll ever return.
Alex Shelly (rumored to be true)
Jack Evans (he's pretty much what Rey Mysterio was to WCW, doing moves nobody has ever seen before)
Amazing Red (it's not even a legit division without this guy)
Petey Williams (everybody already knows why)
I liked Saban but idk if he'll go
Jay Lethal as the Black Macheesemo
that's a division in itself