So far I've come with the concept of:
Royal AU, in which Henry (my main) is a king of a small bit very rich kingdom that trades with the weapons it creates, Henry adopted Larry as a baby in this one and to create a bond with the empire of the blood foxes, (Autumn's and her sister build it) Larry has to marry Spring since in this AU they're not cousins.
Modern AU, again Henry adopted Larry when he's younger that in the main story, there's still magic, but not the classic adventurers, Henry works in his weapons factories, while Autumn is the leader of an international mafia.
Hero AU: basically, Henry is a well known hero, when I stopped and thought about this one I realized he was basically puss in boots.
How about you? Have you thought about an alternative universe of your comic