Blizzard has released the Mists of Pandaria trailer. While the trailer was excellent it hi-lights something that I feel was a huge missed opportunity for Blizzard.
Rift just announced that they were removing faction restrictions so that instead of fight against each other, player will join to fight a common enemy, the rifts and the enemies they spawn. In the Secret World there are 3 factions but are able to fully interact and cooperate in fighting back the demons. The only faction conflict in the Secret World is in dedicated PvP zones.
I have always thought that Blizzard should have made Pandas as a neutral race, playable by all and able to interact with both Horde and Alliance. It would have made more sense to have MoP happen before Cataclysm so that the Pandas could lead the fight in cross-faction raids against Deathwing.
One possibility would be for the Burning Legion to reappear and the Pandas now in the Horde and Alliance leading the combined forces of both factions in the fight.