They’ve already kind of played out the happy reunion angle when August was pretending to be Bae so if they reunite Rumple and Bae, it’s not going to be a happy one.
I think Bae may be dead. In my opinion, he’s served his purpose. Whilst it would be nice to find out what happened to him when he went through the vortex, what more could he add to the story? I’m not sure if I want him to be Henry’s father or not because it would just seem too much of a coincidence that out of all the men in the world, Emma just happened to hook up with Rumple’s son.
Saying that, I’m not against Bae returning or being Henry’s father. I just think he could serve the story better if Bae was dead.