This review contains spoilers for the Supernatural Season 14 premiere, titled “Stranger in a Strange Land.”
Over the years, Supernatural has had a tendency to introduce big, status-quo shattering resets at the start of its season, only to discard those twists within an episode or two (like Season 8’s truncated trip to Purgatory and Season 10’s shortlived Demon Dean arc). But Season 14 – at least for now – seems intent on following through with its huge decision to have Michael take control of Dean’s body – a plot point that has been teased since as far back as Season 4, when Zachariah extolled the virtues of Dean’s Biblical destiny in front of a huge, foreshadow-y painting of the archangel.
Source: IGN.com Supernatural Season 14 Premiere Review