First off, credit goes to Dworrall. He just commented on it in the news post.
Not sure if anyone else noticed, but:
Sorry if it's huge. I was having resize issues.
Another picture for comparison purposes:
You'll see what I'm talking about in the back. The mural of that being.
But that definitely resembles a being like Soggoth in Darkshore. That giant skeleton that was uncoverred by the Twilight's Hammer and then reborn.