Board Thread:Spoilers!/@comment-8345449-20140508142252/@comment-24898439-20140511152359

Perhaps it is that Emma and Hook do something that inadvertently causes Marian's death. She still dies, but now Robin might wish to exact vengeance on them (assuming that they return to SB by the end of the eps) and Regina could not let him exact vengeance upon Emma, at any rate, since she's Henry's mother. This might be the test of their relationship and it would nicely parallel Rumbelle's (although with a negative outcome, so to speak).