Once they announced former writer, Jeremy Carver, was taking over as show runner for a departing, Sera Gamble, I knew the show was guaranteed another season. Besides, SPN is one of the best shows the CW has and a ratings winner with a solid fanbase. Canceling it now would be like shooting themselves in the foot. The small network needs all the good shows it can get and retain. So for once I was never worried about the show's future. ;)
Congrats to Jensen, Jared, and the entire production crew.