I agree with above poster that car takes care of them, it a home thats what they do. I am not sure who Sam was talking to but I would tend to think Its Michael from Pit speaking with Sam (possibly under Gods orders). Backup for this was Dean used an Angel Pin to escape from death and girl was specifically looking for it and her purse (who had the coin) Dean needed. If thats not divine intervention its some next level things like Leviathans that know possible futures. Demon tablet is for sure important all thats going on as well.
I am sure its been said in other forums I think evidence points to they need Michael, and Lucifer to lock the darkness away again. They are going to have to make some choices they dont like because they caused this. Sam is going to say yes to Lucy again, and we will finally see Dean actually accept Michael or Dad might? Michael would be more powerful with Dean as host. Also I believe that Chuck the Prophet (who is WAY more than just a Prophet we all know, and boys dont know he is alive dont think cas knows this yet either.) There is also a chance we will see Raphael again. just because of the casa erotica started playing on same ep Sam prays. Also Death said that it took God and the archangels to stop the darkness in the first place. Megatron also said is really old magic like Lucy level....
Side note would Darkness get re-locked up if someone was cursed with the Mark of Cain again? I think she would. Some will have to bear the weight of the mark. Thats where we will probably Dean and Sam becoming the Immortal protectors of the Darkness and keeping it bound possibly sharing the burden with others.
