Thought you guys might find this interesting. I was doing some reading of the removed zg gear set quests and one of them really stood out.
https://wow.gamepedia.com/Quest:Para...niac%27s_Wraps
"Warlocks tread dangerous ground in dealing with demons, but our demoniacs take this one step further. Through an ancient and arcane ritual, they allow a demon to enter their being. Rather than let it possess them though, they enslave the demon from the inside, absorbing the power of the beast for their own command. It is a feat few are ever able to master."
Sounds very similar to modern day demon hunters. I doubt anything will come of it but kind of interesting.