Ugh Shika didn't get the ring, Hidan's left alive .. All points to Hidan showing up again =).
I had a wierd image in my head of Zetsu digging up Hidan and Hidan being like
" It's about time, it's bloody crampt down there and it smelt like crap! blahblah.."
Then Zetsu giving a really wierd/evil look and eating Hidan's head
.
Hopefully he gets out by himself or if Zetsu helps him he doesn't eat him.