Could I ask, what do you think would be a dynamic between Dolarhyde and a child of his with Reba in some world where the dragon can stay repressed just a bit longer?

Interesting thing to contemplate. I think if it was a boy, just like Will (they are very similar) he would project too much, see a mirror, be afraid the boy would turn out like him. A girl he would shelter way too much probably. See her as he saw Reba: precious and scared he could hurt. He would have a strange relationship with her. He loves her deeply but cannot connect on a obvious level or in the way he connected with Reba, through touch and affection. He would have a invisible connection with her, always there but not tangible, if that makes sense.