I found the entire unborn-baby TLK kiss to be interesting and yet problematic (not even counting the son’s oedipal complex). How could an unborn child know the future to know Rumple would ruin his family again? The only way I could see the baby having foreknowledge is if he inherited Rumple’s seer ability since he was conceived when Rumple had become the dark one again. At the same time, I too question whether “Morpheus” really is the baby. Also, I predict Rumple isn’t going to get a happy ending. He said so in 3×11: “I’m a villain, and villains don’t get happy endings.” He might end up dying a hero (again) to save his wife and son, but I just don’t think a happy life is in store for him. Nevertheless, he’ll finally give up power to save his family.
"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy