"We are here to talk terms. Both of our peoples have suffered at the hands of this "Iron Horde." I mean to hunt down their general Orgrim Doomhammer and make him answer for the attacks on our peoples. Do you have the courage to stand with us?"
So he appears to be a general of the Iron horde. How will thrall react to having to fight his old mentor and friend? Better yet, how will he come to terms with the realization that the guy was not the hero he made him out to be?