Hi /co/mpany. So I'm just going to give my speculation on GOLB and then general Adventure Time theory and speculation thread. All of below is my opinion.
GOLB is the god above all and origin of everything in the Adventure Time multiverse. He is often thought of as evil but I think he is simply amoral. He is the origin of all the comets and all the monsters from before time. Chaos is the origin of all things in many myths and irl so it seems fitting.

General Adventure Time theory and speculation thread go: