Originally Posted by
Ersula
Xal'atath is not the Harbinger. Her return is at one point referred to as "a harbinger," which is just a colloquialism that means "a bad omen" but they're not the same thing. Why would Neltharian use a wormhole to communicate with someone whom, at that time, was already on Azeroth? Why would he design an artifact to bring someone to Azeroth if that person was already here when he made it? That doesn't make sense. Xal'atath & The Harbinger are two different entities.That note appears in game before Iridikron is even free from his prison. So you obviously shouldn't assume they're already talking about him. They're talking about the Harbinger.
If Xal'atath opened a portal on her own to leave Azeroth in BFA, why would it require an artifact or the power of Galakrond for her to come back? Why would her return to Azeroth convince the Titans to return, if she was already here when they left? These are all the reasons the "Xal is the Harbinger" theory makes no seanse.