Yeah, and this happened centuries before the curse, so if this vortex drags Bae to our world, he’d be long dead. If they want Bae to be in our current day timeline at all, there will need to be some explanation of how he’s lived so long. That’s why I think he ended up in Neverland as Peter Pan, and I think this scene will show how he ended up there.
If in future seasons they develop the ability to travel between worlds, (which Jefferson has possibly done via Emma’s hat), Mr Gold could go on a search for his son. My theory on why Rumple made the curse involves him ridding himself of the Dark One curse, which we’ll see him promise to Bae in this ep. As he’s now rid of that curse, I believe he’d jump at the opportunity to find Bae so he can show him he kept the promise, and they can be reunited.