Ok, i'm not saying that nobody was expecting a void servant to appear, i'm saying its funny that most people, on twitter, reddit, here and the forums just kinda took that specific NPC at face value, to be some sort of Simulacrum like Sindragosa or residual essence/echo like the Shade of Medivh/Echo of Aegwynn etc.
No fucking shit that inside a void raid, about a void servant, around void related enemies, with a void related final boss is gonna have void spawn in it.
The mere inclussion of a faceless one wasn't what was surprising to me.