It's expansion time for World of Warcraft, and once again the game is getting a major shakeup. In fact, the pre-expansion "bridge patch" could be called the biggest change to the game since launch. Previous expansion, The Burning Crusade, only added some new talents and slightly tweaked some of the classes. For the second expansion, Wrath of the Lich King, just about everything changes. Most of the changes apply to everyone and they arrive a month before the actual launch of the expansion.