Share what campaign setting your group came up with! I'll start:

One memorable campaign during playtesting had us protecting an archipelago that was the Nursery of the Gods, where each of our Signatures were unclaimed divine domains. My Signature was wetness and another player's was pressure; when we Fused we summoned up Lil' Squirt, a god of water pressure that took the form of a boy in a leaky wetsuit.