i'm predicting an appearance by Bobby since he was a ghost when he left the mortal coil and would likely end up in purgatory..also HOPING for an appearance by Mary and John for the same reason.
maybe Bobby, Dean and Cas can save them from monsters with an axe to grind with the only former hunters to end up in monster land...but, of course there's also a chance that Gordon might show up since he was a vampire when he kicked it and he will not be friendly i'm sure :)

I hope so...fiercely. I am still very much torn up over Bobby's death and I want him back so bad. :(

@lucy, I'd love to see Gordon again!

same here! in the wise words of Dean "Bobby, you're awesome!"

Why would Bobby be in purgatory?????????????????? He doesn't qualify for his spirit to be in Purgatory! I love Bobby though and hope he returns in some shape or form.

^It's a possibility that he is. We don't really know what happens to spirits after they've been dealt with. I don't think it's about him 'deserving' it. I think it's about him refusing to go with the reaper when he had his chance. My theory is that reapers act as guides to heaven or hell and without their guidance, the spirit just ends up in purgatory.

agreed on the reaper part, i think Bobby is just wandering through purgatory, since he has no road map to heaven at the moment :)