Who is returning? Spoilers

I thought the person to die as I heard from a fellow fan/youtuber, is going to officially die and be gone for good. If someone is going to die and then brought back to life in the same hour/season, I dont see that hurting anyone, unless there is a catch. But like I said below, when you have a character who is as powerful as Jack or God, I dont see the death to be sad if they are just going to be brought back to life. Now, with me saying that it doesn't me I want anyone to die. (Unless it's Claire)...but I dont want to see her either, especially in their last few episodes. Now I feel like I'm rambling on

Who’s going to die? Who doesn’t on this show? It’s gotten to be ridiculous and boring but that’s Dabbs showrunning for you. I wish someone would die and stay dead. No miraculous resurrection from a higher power. No finding just the right spell tucked away in the gruesome fleshy bindings of the Black Grimoire. No dying to make a deal with Death... That was cool the first few times Dean did it but now it’s just getting silly. Cosmic consequences anyone? More like - what cosmic consequence? Apparently Billie didnt feel as if AUMichael threatening to tear down the universe until he found God one so... or if she did she’s keeping it carefully under wraps cause she ever told Dean before sending him to his watery non death. “Splash”. God coming back seems a little silly after all this.

I hope it’s Cas. For good. Character has long outlived his usefulness.

On the last episode did they ever say where Nick got the syringe full of angel grace? Plot hole?

That's a interesting theory. Though, I think they made Jack too powerful and with God returning I'm not really that worried about who is dying because I assume to see them come back. So, that's a problem imo.