This is garbage if it turns out to be true, blizzard has so many GOOD potential races this is ridiculous.

Horde:
Mok'Nathal (half-orc half-ogres, those big red guys in blade's edge)
Nerubians (what's happening to them now is EXACTLY what happened to the forsaken)

Alliance:
Dryads
Ethereal (neutral race, falls along the same lines as goblins)