It's Always Sunny In Philadelphia Season 13: Everything We Know So Far
2. All The Secondary Characters Are Returning
Those that are upset by this casting shake-up can rest easy in knowing that basically all the other beloved characters are returning, especially the guest stars.
A promotional video for the season showed Luther, Artemis, Bonnie Kelly, Jack Kelly, Bill Ponderosa, Margaret McPoyle, the Waitress and Mrs. Mac all talking into a torch in keeping with the horror theme, and several of these characters point to several more.
If Margaret McPoyle is featured then it's likely her extended family will be too, which would perfectly complement the horror theme. As well as the Waitress, Rickety Cricket is a long-standing regular on the show, and it's highly likely that he's back too.
Of course, there are too many recurring characters to have them all turn up over the course of one season, but the gang has angered many of them over the years - none of them would turn down the opportunity to enact some horror-themed hijinx on the gang.