If you want to learn more about what is going to happen when the patch 6.1 (with spoilers) will launch tomorrow, then you must read the following article published by Blizzard. How many orcs do you need to kill before the end of the Iron Horde and the other savages foes of Draenor?
Since we first stepped foot on the Draenor of the past, we’ve been inexorably drawn toward one intriguing tale among a multitude of storylines taking place there. In patch 6.1, the quest line that began with ‘Call of the Archmage’ will continue, and the stakes have never been higher.
Spoilers follow from here! Do not read this post any further if you do not want story details spoiled.