John D. Rockefeller wrote:the writer/creator intended for 5, the network said you are doing 6. Last I saw he said he would not do another
I personally would not want to see another, lest it be turned into what sg-1 became. A milked and destroyed story. As good as it was, I'd rather it go out before becoming a trash heap of nonsense
Eric Kripke said he would do 5, when he got the go ahead for supernatural his intention was always to only do 5 and finish it with the apocolypse.
When season 6 was planned he pulled out at being the lead on it, and left supernatural to the executive producer Sera Gamble. He stayed as a hands-on executive producer, but is not fully involved anymore.
So supernatural is already "basically" without its creater. Thats the reason i would be ok with another season, due to this one being good without its creator making it. But as i said, i will only be ok with another season based on the finale. a finale can make or break a whole season. lol.