This has been raising all kinds of questions regarding who exactly we'll see on the other side of that portal. What about Azeroth, in that version of reality? What about Deathwing and his kin? What about the Velen leading the draenei at that point in time, what about younger Garrosh? Will there be duplicates of orcs who have since made their homes on Azeroth, after traveling through the Dark Portal? Will the Alliance Expedition be stranded on this version of Draenor? Just who are we going to see over there, and who won't be making an appearance?
While we don't have all the answers, we have more than enough to start filling in the blanks.