I would rather at the end of this storyline all the time travel shenanignas finally catch up with everyone and Nora accidently earases herself by messing around with the time stream. It would be a good way to finally put and end to all the time travel nonsense in this show by having it linked to something tragic like that. Think of all the drama they could squeeze out of Nora doing the slow fade because she screwed things up so bad.