Dean briefly had black eyes in the preview and was wearing the shirt that’s associated with demon!Dean. We don’t know if it was a dream, a hallucination, or something that will really happen.
I honestly don’t understand what’s expected from a God story-line or why so many people want it. I get that God’s a big mystery and many people want to know more about him but if God were to be involved in fixing things it’d end up being really boring. He could fix any major problem in seconds and then what? Spend the rest of the episode writing fanfics with Sam? Okay, that does sound pretty cool but it sounds like something that should be written as a fanfic, not an episode. As for God revealing his plans, why are people expecting that to happen? Honestly, I’m not being rhetorical, I’d like to know the thought process behind that. It doesn’t fit with any version of God in scripture and maybe that’s why it has me baffled. God doesn’t reveal his plans, he works in mysterious ways. The major basis of faith in the Abrahamic religions is the fact that people don’t know Gods plans. Plus the way Supernatural has portrayed God so far has been a very Diest view of him, meaning he doesn’t seem to have any plans, he’s letting the world run on it’s own and is simply observing what happens. But if you have thoughts on a God story-line I’d love to hear them in more detail.
Bringing back Michael and Lucifer could be an interesting story-line if it was handled right (meaning it can’t be a rehash of season 5, it has to be unique in significant ways). Something like that really needs it’s own season to do properly so I doubt we’ll get much Michael/Lucifer/Adam stuff in season 10 but it could be the plan for 11. I think it’s possible that Lucifer will be the only way to get the mark removed. Even if they find a ritual or something to remove it I think it would be tied to Lucifer and have unforeseen consequences involving him. Lucifer is the one who created the mark, Metatron said “The river ends at the source” which I think was referring to Lucifer, and then Fan Fiction 10.05 had the little reminder that Adam is still trapped in the pit. Based on all of that, I think there’s a very good chance that we’ll be seeing Luci again but I don’t know how or for how long. Maybe the pit will be opened and everyone will jump free. Maybe they’ll find a back door into the pit, get Luci to remove the mark and rescue Adam before boarding it up with Michael and Lucifer still inside.
As for the series getting weak, I’m guessing from you’re desire to see Chuck, Michael, and Lucifer again that you’re favorite season was 5? That’s true for most fans, including me, 5 was amazing. I seriously doubt that any season will ever be as good as 5, comparing other seasons to 5 is just setting yourself up for disappointment. But I do think the current season is great. I love the massive amounts of character development we’ve gotten during the Carver-era. In seasons 6 and 7 the character development stagnated quite a bit but they’re making up for it now, getting our boys the personal growth that’s needed to keep the story-line evolving and engaging. We have a handful of episodes left and they’ll be wrapping up most of the story-lines they’ve been running the past 3 seasons, I can’t wait to see how they’ll all turn out. The last two episodes were slow moving and that’s difficult this late in the season but the next one looks more exciting. I think the fandom will be energized again after Wednesday night.