The WoW EU PTR Forum has been cleared, which usually indicates that the next patch is due for testing. In this case, it most likely means that patch 3.3, where players will face the Lich King himself, is being readied for player testing. (PC, World of Warcraft, World of Warcraft: Cataclysm, World of Warcraft: The Burning Crusade, World of Warcraft: Wrath of the Lich King)