I'm sure this has been discussed to death, but there is still hope Deut.
Just make the blue man group part of the 'ancient aliens' crap and have them be the genetically-tampered-to-perfection offspring of the Elephant Jockeys with humans, maybe created to be go-betweens in the ancient past? They could have human traits, forms, obviously, that can mate with the Elephant jocks biomechanical technology.
Then the Dr. Manhattans steal the secrets of the Alien goo (used to create life) to destroy their former parents, who left them on Earth, leading to the starmaps. They're angry at the Elephant jockeys, and stumble upon the Alien (which is the consequence of using the goo on humans, who were created by the Elephant jockeys causing a sort of hideous 'inbreeding.')
The blue man group sets up an elaborate temple to their perfect, hybrid kind (the head) and attempts to weaponize this goo when Janek shows up with his Christmas tree.
((This ain't gonna happen, but it's where my dreams want to go!))