So at 8:18, does that confirm Xavius is still helping N'Zoth and not the Legion (if that was already obvious in game, I apologize, I haven't seen much of the lore from the Nightmare stuff going around)?
Something I find interesting, are the comments about N'Zoth's prison weakening in a way that implies N'Zoth will actually escape. The Chronicle mentions the Pillars of Creation being used by Elisandre and her people to seal a second portal during the War of the Ancients. However, when Legion was first announced, another use was mentioned that did not appear in the Chronicle:
http://www.mmo-champion.com/content/...Dev-Interviews
It was said that the Pillars were used two thousand years before the War of the Ancients to seal a wound in the world, then the Temple of Elune was built atop it. That wound is now open and the demons are pouring through. That Temple of Elune, as we know, became the Tomb of Sargeras.
Is it possible that this wound was, in some way, related to N'Zoth's prison, and the Legion are accidentally weakening N'Zoth's prison? That would definitely go along with the arrogance about the Legion and acting like they don't really know what they're doing either.