I am hearing more and more that it is
H.P. Lovecraft inspired from the
Cthulu Mythos. I could get fired up about this...
The Cthulhu Mythos is a branch of horror fictions which has stood the test of time. Begun more than 80 years ago, it's not quite a shared background, not quite a genre of it's own, not quite a series of homages and inside jokes by the writers who created it, but it has elements of all of these (along with some damn fine story-telling). It has inspired some hoaxes and conspiracies, some terrible movies, and even a few popular video games.
I have also heard
VOLTRON might be the case here.