Blizzard is proud to officially announce the next World of Warcraft expansion set, World of Warcraft: Wrath of the Lich King! With the opening of the Dark Portal, and the renewed war to stop the Burning Crusade's destruction of worlds, the heroes of Azeroth have given little thought to the frozen wastes of Northrend – and the terrible, ancient powers that wait there. Yet the brooding evils of the fallen Nerubian empire and their malevolent sovereign have not forgotten Azeroth...
World of Warcraft: Wrath of the Lich King™ will open the forbidding wasteland of Northrend to exploration by the hardiest adventurers. New levels of power, challenging new dungeons and encounters, an exciting new character profession, and the game's first hero class are just some of the new features awaiting players in Wrath of the Lich King.
http://www.worldofwarcraft.com/wrath/