Originally Posted by
MikeBogina
When it comes to the different magics, Fel, Death and Void are usually the big ones we fight with. Many times the others are because of Old God manipulation/control and Malygos going rogue and then there's the 2 political ones that still ended with Void and Fel.
Death has slowly been rebuilding into a huge threat again, even being developed as something more than it was before. Void is still the biggest threat and obvious one to reoccur and Fel has fallen hard. I think Light is slowly replacing fel as a member of the 3 evil powers, with Fel probably coming back again later as fodder of the Void(just like the Void uses Elementals and corrupted nature).
I think don't think will fight Elementals/element as a big threat ever again, but I can see Magatha doing some dark shamanism. Arcane is probably never an enemy again, besides individuals(though it's never been a force like nature, light, void, etc... just a tool). I do think we'll see an evil nature power rise up thanks to the Botani now on Azeroth, going unnoticed. And Fel is now one of these lesser forces that we'll never again see being the major enemy of Warcraft again, unless somehow blizzard decides to keep wow going far longer than it should.
So in my opinion Light, Death have a huge threat coming and void most likely has 2(especially if BFA ends with N'zoth)