IF I were organizing a crossover between the Boone universe and the Doors universe (Geron already said in a comment somewhere they they are totally separate universes) I would have Charlie, Ricky, and Keerby meet Cally by accident while exploring alternate side universes, then using Charlie's second presence, Ricky's tag-along ability, and Keerby's universe-hopping expertise to take Adrian and Kippy along for powering, Horace for sensitivity, Robin for general ability, and Ragal and Casper and Durapar, Uncle Bob for his ability to copy Ragal's magic as well as use his own, and that combo allows for wide ranges of experience. Just dreaming, @Geron Kees. But you are certainly welcome to use any and all ideas I come up with with my blessings, IF you ever do a crossover, whether done by second presence or physical arriving in the Doors universe.
Geron, can a Door be re-directed to a new destination, or is that beyond even Armenti tech?