When it comes to Moana, no two theories are exactly the same, but a lot of them seem to be focused on how Moana was able to not only complete her perilous journey, but how she managed to do so while performing seemingly superhuman feats. One of the darker theories floating around out there is that Moana ended up dying at the beginning of her journey. And that her being dead was the only reason that she was able to complete her mission and return the heart to Te Fiti. This theory is particularly interesting because not only would it explain how Moana was able to return the heart, but it also explains how she may have turned into a demigod, and why Te Fiti looks exactly like Moana once her heart is returned to her!