From all the new infos we have now, what if N'zoth will end up as our ally (at least for some time)?
In 8.1.5 he said
It grows hungrier...bolder. Alas, your eyes are closed.Sounds pretty likely he meant the unknown death entity, that made Sylavanas warchief and which she is serving right now.I alone can save you from what is to come.
And with his linehe is actually talking about opening our eyes to the true threat we are all facing right now, the powerful death god.All eyes shall be opened.
Sylvanas thinks she outsmarted N'zoth into thinking the factions are weak now and attacking us, and from that war he and we will be weak enough that the death entity can easily kill us all. But N'zoth is smart enough to make us attack said death entity instead of him, now that hes free.
It would also fit into Ogmots journal
The crows represent the death entity (Helya or Mueh'zala most likely) Sylvanas serves, and them getting "fat" means said entity is growing more powerful through the dead/souls from the war. And since Ogmot knows this, N'zoth knows this too.Ogmot sees lady wrapped in dark swirlies. She leads herd of blind sheep.
Da sheepies follow her everplace she go. Do everthin she say. Never doubt lady.
She guide dem over tall cliff! SPLAT SPLAT SPLAT! Stupid sheepies!
Da crows get fat eatin da sheepflesh. Da lady laugh as crows eat!
Maybe thats what he means with the player being his chosen one. He'll help us (the player) temporarily to defeat the death god, the "enemy of all", because otherwise Azeroth would die before he can corrupt her.
In 8.3 Horde/Alliance assault Ny'alotha, but it ends with N'zoth telling us, at the end of his boss fight, we have a bigger problem right now.
Edit: i know its somewhat unlikely, and well most likely just kill him in 8.3 and in 9.0 the death stuff, since Blizz writers have the creativity of a 5y old, but its fun to think about it.