The War Within is more than just another expansion for World of Warcraft, it is the first part of a trilogy of expansions known simply as the Worldsoul Saga. This trilogy will consist of The War Within, Midnight, and The Last Titan. The Worldsoul Saga begins with players investigating a new area that will lead them underground to Azj-Kahet where they will seek to uncover the machinations of the sinister Xal'atah.