While it is not confirmed that Mists of Pandaria is the next expansion, it very well could be. We don't exactly know what the next expansion has in store for WoW players, but we are certain to find out at BlizzCon. Mists of Pandaria could be an expansion that opens up many islands still as of yet explored and populated by players on Azeroth and could potentially provide some new land grabs for the Horde and the Alliance to quarrel over after Deathwing's demise. Whether or not the Pandaren race will be playable is definitely up in the air, but Blizzard has apparently had issues with bringing panda people into the game in the past. Personally, I would much rather prefer another space exploration expansion like The Burning Crusade, as we've been on Azeroth for two expansions already, and I think it's time to head to the stars again.