Lost Tapes/WMG

The Cultists in Q: The Serpent God really fucking goofed.
Quetzalcoatl, being one of the more benign deities of the Aztec pantheon, discouraged human sacrifice. This leads to either two possible interpretations. Either the cult made the mistake of trying to summon him with a human sacrifice and ended up corrupting him because of it (turning a normal, nice god into a man-eating abomination) or they ended up summoning a different god altogether, probably the much less benevolent Yig.

The creature in "Beast Of Bray Road" really was government made.
If you follow normal evolution, a wolf or bear-like creature evolving to walk fully on it's hind legs is impossible. This leads to either two possible interpretations. Either it was a government (perhaps FBI or CIA) made biological weapon to attack that militia, or it was an independent genetic experiment made by a government scientist or scientific group, which the FBI or CIA then used to attack the millitia's base but was unfinished and then escaped and the FBI or CIA is looking for it.