I'm actually wondering, since Lucifer and Michael are still trapped in the cage, would they be succumbed to having a little brotherly bonding time, or fighting it out as they were supposed to have done and then, after years Hell-time of duking it out, they start bonding and making amends? Also, assuming that Sam's soul is still trapped in there as well (however they plan on explaining that), would he be kind of playing referee? Hey, what better way spending solitary confinement with two archangels trying to sort out their brotherly and familial differences. It would actually be a metaphor of the Winchesters, the fact they keep rehashing the same-old issues and it would take centuries for them to come to any kind of resolve or moving forward. Not that I like that direction they're still doing for them honestly, it's boring as fuck now, but whatever.
Also, I miss Marksha. ;___; Despite being an important factor last season they really underused him. I am sorely disappoint. MARKSHA COME BACK TO US!
They also need to mention Adam somewhere this season. Neglecting him is just making their continuity failings even worse. Just saying.