Warlock: i'd like to see a really cool demon maybe a netherzhim they are to intelligent to not see the legion defeat and jumping ship
DK: i'd like to see some old fella from naxxramas or icc, Razovius, Noth, Ferlina or even Putridice (Good news yell greeting the deathlord)
Shaman: Thrall it's time for him to come back
Warrior: Hellscream sr for the horde, the guy who is Rambo meme for the alliance.