San Diego Comic Con is definitely known for being the place where rumors and secrets are everywhere, but what some reporters found out from Executive Producer Bob Singer shocked even them. During a round table discussion, Singer let slip that a Supernatural spin-off was being developed. The premise of the show would be revealed in Season 9 of the long running hit series.
From what we understand, around the 20th episode of Season 9 is where the jump off point will take place. When asked about the spin-off, several other cast and crew of the series, including actor Mark Shephard and Showrunner Jeremy Carver kept quiet.
Bob Singer did mention that both Sam and Dean would appear in the spin-off, but that the new series will be all new characters.
Stay tuned for more details!