The most recent build of the Warlords of Draenor beta has dramatically altered the Blasted Lands. The zone has been entirely conquered by the Iron Horde, with small Alliance and Horde camps offering a new, level 90 questline. At the moment, it is unclear whether this is a permanent change, or simply a temporary world event for the expansion. I believe it might be a mixture of the two, as Blizzard had described a launch event more grandiose than what has currently been added, and there still needs to be a questline leading players to Draenor. Currently on the beta, players speak with a gigantic version of Khadgar in Stormwind and Orgrimmar who teleports them to Tanaan Jungle, most certainly not final.