It's going to be the southern continent of Draenor. Ogres and Arrakoa as new races. Yrel's Lightbound Crusade as the villains to start. Mid-way through the expansion, it'll switch to the Void Lords being the villains with Yrel having tried to stop them, and us being idiots for stopping her. K'aresh will be the endgame zone ala Argus with Dimensius near full-power as the final boss.