Supernatural Season 11 has been confirmed. And in March (Of 2015, it will be moving to Wednesday Nights.) So my guess for Season 11 is this: They wrap everything up and Sam, Dean and Castiel end up fighting for their lives.  (First Season 10 has to tie up all the loose ends.)
I guess it will depend on how many more seasons they plan on doing….
…spoilers! I’m still on Season 6 🙂
Oh yay! Another year of the Winchester brothers. Hope they do more wacky stuff.
And MrCrow…get with the program. A marathon is in order for you. Break out the beer, bacon cheeseburgers and pie!
Wait til you find out…well, you’ll see. 😀