World of Warcraft: Burning Crusade have not been on the shelves yet. However, the patch for the Burning Crusade have been unleshed by Blizzard.

Several years have passed since the Burning Legion?s defeat at the Battle of Mount Hyjal- and the races of Azeroth have continued to rebuild their once shattered kingdoms. With renewed strength, the heroes of the Horde and Alliance have begun to explore the broken lands beyond the Dark Portal. What dangers or rewards await mortal champions in Draenor? And what will the Alliance and Horde do when they discover that the demons they thought vanquished have returned to renew their terrible Burning Crusade?

Our latest patch "The Burning Crusade" sets events in motion for the release of the Burning Crusade Expansion and the opening of the Dark Portal. A stirring of events has begun throughout Azeroth and rumor points to the Dark Portal as its source. The time has come at last for the dark forces of the Burning Legion to make themselves known.

You can read the entire patch notes here.