Imarvelnation
Sam gets more than just his soul back. As the line between he and Lucifer blurs, there's one thing they completely agree on: they need a council with God.
[Idea from a combination of the fact that angels leave behind some of their grace after possessing a human (Season 9) and how Nick acted in Season 14 after losing Lucifer and from the fact that Sam has been a side character for such a long time]