What would you even have it be about? Sequel? Prequel? Wendy, Pacifica and Soos best buds team winter time mystery solving adventures? (okay that one sounds pretty fun)
And who would direct such a project? Hirsch? I heard he nearly lost his shit trying to get season 2 finished. Apparently the dude does not handle pressure well. He's a very creative individual with some great ideas and writing talent, but he has made it clear that he does not really enjoy being the head of a whole project. I heard that Disney approached him about a season 3 but he turned them down because he really isn't interested in working that hard.