and your post has the same amount of relevance. This is a speculation thread, not an announcement.
They wouldn't put a NiM tier boss in a SM op.
At least give us a screenshot.
Plus I can't see them making us spawn a boss in a boss fight. They couldn't even get the fight to work properly when it was released, that sounds like bug hell.
There were files mined a while back on what the boss might be, but I can't post them here.