Draenor, like Azeroth, is populated by more than just one sapient people. We've talked at length about the orcs who were born on Draenor, and the draenei who landed there and named the world as their refuge. But there were others. Some have vanished entirely since the creation of Outland, while others escaped to Azeroth or continued to exist on the remnant continent itself, floating in the Twisting Nether.
Thus, our trip to this new Draenor will allow us to come face to face with beings we barely know, as they were before the destruction Ner'zhul unleashed, and with beings we've never met or seen, entities of legend. While we still don't know exactly what we'll find on Draenor (I'm sure it will be savage) we have enough clues to start talking about the denizens of that unknown (to us) world.
So, who were these others?