Ok, Quria was cool and all... But where is this guy from the trailer?

Can we talk about the "Dark Atheon" that we saw in the Season trailer? Where is it? Could be a boss to a secret quest? A new Exotic? A Dungeon? Or the Master VoG will have the same aesthetics from the Vex Network?

EDIT: I forgot to mention that, in the trailer, it appears inside the Vex Network.

EDIT 2: Sorry, I think I wasn't clear enough. I don't want to give spoilers (or I don't have them), but feel free to do it. I really want to know. :D

EDIT 3: First Page! LOL!

EDIT 4: Thanks for the silver!

https://imgur.com/gallery/TzkEIrE