Christie Vela (Director/Producer) and Michael Federico (Writer/Producer) also share a Podcast called Terror & Tacos where they discuss Horror Movies... and Tacos.
The Finale was originally titled Final Dress, which is how theater people refer to the last dress rehearsal before a show opens.
The musical the campers rehearse, What Mary Saw, is not a reference to the horror movies The Last Thing Mary Saw (2021) or What Josiah Saw (2021), as those movies weren't out yet when The Finale was written and shot. So, it's just a coincidence.
The original title of The Finale was FINAL DRESS, referring to the last dress rehearsal of a play or musical before previews or opening night.
The building that serves as the outside and lobby of the theater is the historic KALITA HUMPHRIES THEATER designed by Frank Lloyd Wright. It's the only theatre Wright ever designed. The theatre that serves as the inside is Theatre Three, one of the oldest regional theaters in the country located in Uptown Dallas,Tx.