Also, Wrathion in one of his journal entries for 8.2.5 refers to the fight against N'zoth as the "true Battle for Azeroth." (I've had a personal prediction since the expansion reveal that the title was a double meaning. Yes, it would start out as a fight between Horde and Alliance for Azeroth. Then it would pivot to us having to work together to fight N'zoth to save Azeroth.)