I'm surprised Gold would even consider changing the course of his son's life by going to the dark realm. He wanted this child to love him. Now Hoodeon is exactly like his father. Dark, powerful, and trying to destroy Emma's life by killing her, and take her from her family. What dark one could be more proud?
Lesson you learn going into any tv show: Don't get invested. Don't hope for anything. You'll only end up disappointed.