Originally Posted by
Jastall
N'zoth was all but confirmed at last Blizzcon when the fish representing him was on the final presentation slide (Argus the planet was teased this way for Legion) and 99.9% confirmed when the finale of Eternal Palace showed him go free after Ion told us we would know who the final boss is after that cutscene.
I have no idea why there's any confusion here. The war's all but over already, Anduin and the Horde rebels will be friends against the eeeevil Sylvanas, she gets ousted in 8.2.5, 8.3 is N'zoth. This is clearly the only way the story can move forward, the two main plotlines of BfA have been the faction war and the Azerite/Old God stuff, they're not going to veer away into Shadowlands or Dragon Isles or anything like that in the final patch.