The hell thing, who knows?
But the alien thing, I think it's correct.
The easter egg of CotD when will grab the golden road in the flash green light.
The Dropa Stones in Sangri-La, Nuketown zombies, and Moon( I think have one there too).
The pyramid in the space in the moon comic book.
But I can be wrong because they are treyarch and they clearly can make God battle against the king of the planet Wubwub, because they are crazy. Ssshhhh, they can hear us...
And yeah, I think they are similar too
