WoW: 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…
The former death knight and now Lich King Arthas has set in motion events that could lead to the extinction of all life in Azeroth, as his undead armies and the necromantic power of the plague threaten to sweep across the land. Only the mightiest heroes can survive the frozen northlands with any hope of disrupting the plans of Arthas -- and perhaps even challenge the Lich King himself and end his reign of terror for all time.

Some of the features announced at BlizzCon 2007 include:

• Level cap raised to 80
• Battle with the Lich King at the Frozen Throne
• One new playable class: Death Knight
• A new continent: Northrend
• The creation of a new profession: Inscription
• Profession level cap raised to 450
• Hundreds of new items, quests, dungeons, creatures, spells and weapons
• Siege weapons and destructible buildings (for PvP)
• Transform your hero's look with new character-customization options, including new hairstyles and dances.
• A non-instanced Battleground.
• Improved Graphics Engine (applied to shaders, flame effects and detailed shadows)
• New factions including the Speartusk and the Taunka, a racial cousin to the Tauren.
• Subsequent features announced or confirmed by Blizzard include :
• Achievements for both the expansion and existing content
• New Mount, Vanity Pet and Token Storage
  

Several new instances will be included in the expansion pack. Another instance will appear in the Caverns of Time, set during the human campaign of Warcraft III: Reign of Chaos, in which Prince Arthas massacred the townspeople of Stratholme because they were infected by the plague. Many new 5-man, 10-man, and 25-man dungeons will be located in Northrend, including:

• Utgarde Keep - An instance in the Howling Fjord filled with the Vrykul, a Viking-like race devoted to serving the Lich King. It has two wings - Utgarde Keep, and Utgarde Pinnacle.
• Azjol-Nerub - The contested capital of the Nerubian race of spider-people.
• Icecrown Citadel - Players will battle Arthas the Lich King, the ruler of the Undead Scourge.
• Naxxramas - An updated version of the original Naxxramas, redesigned to cater for 10 and 25 man content. Blizzard has also confirmed a new instance hub called the Nexus, home of the Blue Dragonflight, which will contain at least three instances. The first, a low 70s instance set in Ice Caverns, the second a high level instance seeing the player and their group face enemies on floating rings, and a final raid instance against the Blue Dragon Aspect Malygos, which takes place in a rift in the sky.