User blog:Hunterinpurgatory/How long will Dean and Cas be stuck?

Just a poll on how long people think the show will keep Dean and Cas in Purgatory: I could see it lasting as little as 2 -3 episodes or as long as half a season( I think the brothers will need to be together by the second half of Season 8 to defeat the Big Bad). Also, what sort of plotlines do you see for Cas and Dean while they're in Purgatory?