With AMC’s Immortal Universe based on the works of the late author Anne Rice now two series strong — and with more reportedly in the works — fans of Rice’s works have one big request: they want a crossover between Mayfair Witches and Interview With the Vampire. After all, both series generally take place in New Orleans and there is some crossover between the stories of the Mayfair witches and the vampires on the pages of Rice’s novels, particularly in the later novels in The Vampire Chronicles. Even those in charge of the show have acknowledged that a crossover of sorts is possible for the series, with series co-creator Esta Spalding even recently noting that there is a character that appears in both shows that no one has figured out yet. Now, however, executive producer Mark Johnson is explaining the challenge to building the connection between the two shows especially since they are very much their own individual entities.