Yup. People think that Alliance will get a Horde rig but I'm not so sure.
If it's ????? / Light Undead (Human) on Horde it could be Dragonmen (Worgen) on Alliance, but that means there is no faction rig swap. Which may or may not make people shit themselves.
But if it's ????? (Worgen) / ???? (Forsaken) and Light Undead (Human) / Mok'nathal (Kul Tiran) at the end, EVERY RIG gets used.
Depends on if they do a 2 pack or a 4 pack at the end.