Bringing back the dead isn't impossible. Whale did it.

[She goes quiet and still for a moment at that, but then she shakes her head and takes a deep breath, letting it out.]

No. If Gold did this, if he brought Neal back, he wouldn't do it without knowing they'd be together. That'd...be the point, right? To have his son, to be with him. There are too many people here from other places. He has a wide reach, but not that wide.

[That imp isn't as important as he likes to think he is, and she won't entertain the thought even when he isn't here.]

I wanted to believe it was him, and I did, until I saw Neal here and no Rumple.