Originally Posted by
Varodoc
A Dragon Isles expansion will feature N'Zoth as the main villain once again, just you watch.
It will be revealed that N'Zoth survived the destruction of his body by transferring part of his essence inside the empty Blade of the Black Empire, which he gained from Xal'atath as part of their bargain. As the blade was used by Wrathion to stab him, and collided with his body, N'Zoth inserted part of his essence inside the blade. So that he could one day be reborn. Consider this a contingency devised by the most cunning of the Old Gods.
The final fight taking place in Ny'alotha will also come into play, as it will be revealed that, like the first encounter with Wrathion, not everything seen in Ny'alotha was real.
Ny'alotha is not a real, tangible place. Ny'alotha is a twisted manifestation of the future that N'Zoth envisions for Azeroth. It exists and is fabricated by N'Zoth's endless imagination.
Anyway the take-away here is that no one but N'Zoth can serve as main villain of this expansion, and this is hardly surprising. Deathwing, the greatest enemy of the Aspects, the fallen Aspect, the threat so great that the Aspects had to give up their immortality to defeat, was but a puppet of N'Zoth. N'Zoth has always been the one to meddle and mess with dragons.
OP, the creatures you cited are not "main villain" material. They are but twisted puppets and experiments of N'Zoth.
This however makes so much sense, is so logical, is such good writing, that I would upvote you if I could. Who else to save the dragons and defeat the Void, than the first mortal to successfully defy the Shadows' whispers?