Good point. Rumple cares more about Bae than Henry, one of the reasons he’s going after Henry is to honour Bae plus Henry is now Rumple’s only link to Bae. I wonder if Peter Pan is trapped in Neverland and Henry is the key to his escape hence why it has to be Henry and not just any random boy.
Henry being the child of the saviour would mean she would have to protect him kind of how in Buffy the vampire Slayer, Dawn was the key but was made to be Buffy’s sister so Buffy would have to protect her.