I KNOW WHAT THE PRIME ASSET IS!!!!!11!!1!

The Halloween poster we see has a ghost in the back, no legs, no body, just a floating ghost. I made another post a bit ago talking about a cool Ex-pop idea with being invisible, and I truly believe that this prime asset will be a invisible stealth prime asset. They have the little flangy thingamabob cut from their mouth so they can probably make a distinct noise while lurking, also, they are some spiritual leader, and maybe the way they tricked people into believing is becoming invisible.