Mists Of Pandaria

Wrathion spent pretty much the entirety of Mists of Pandaria sending us on errands -- and now it appears the Black Prince is on Draenor. Yet despite evidence of his presence, he's nowhere to be found. Then, of course, is the question of why Wrathion would be on Draenor when it's the safety of Azeroth he's concerned with, especially after his visions of the world being overrun.