Board Thread:Spoilers!/@comment-1916997-20151017160320/@comment-6175354-20151202130111

Farerb wrote: I think she wants to sacrifice herself to save the man who just humiliated her and killed an innocent man. Emma should have done that from the beginning, if Hook's life was so important to her! He was more than willing to die for, back in Camelot.

Theory for The Sacrifice scene.... the Nevengers face off against the Dark Ones, at the edge of the Underworld pond. Regina raises Excalibur, ready to cut Emma down. Hook regains control over himself and poofs in between them, taking the blow.