AceShowbiz - Season 4 finale of "Jane the Virgin" succeeded to make everyone drop their jaws with the appearance of a presumed dead character. Bearded Michael Cordero, who supposedly died in season three's "Chapter Fifty-Four", emerged when Jane showed up at Rafael's apartment expecting a marriage proposal.

It remains to be seen what happened to the character and how exactly he survived when everyone thought he's dead. But one thing that's certain was that Sin Rostro seemingly hinted that he knew about Michael's existence all along. He told Rafael, "What I know is going to change your life forever."

One wild fan-theory suggests the Michael whom Jane saw in the season 4 finale wasn't actually him, but an impostor who looks like him instead. As to who the impostor is, the theory further states it may be Derek, Rafael's half-brother. Both he and Michael have shaggy hair. In addition, Derek sported beard. Whether or not the theory is true, fans can only discover in season 5, which seemingly will also be the final season of the series.