Someone tweeted Jane Espenson asking if we will see Rumple and Belle together again this season and she tweeted back Yes.
However the question could be interpreted in several ways such as fairytale land or Storybrooke, whether Rumple and Belle will be sharing a scene etc.
I don’t think they will kill off the Rumbelle relationship because it is very popular perhaps more so than Snowing. However, the relationship will have obstacles along the way, Belle’s amnesia is just one such obstacle.
Bae and Rumple’s relationship is the one that will probably take seasons to resolve properly. I can see it as a one step forward two steps back kind of thing. Rumple is going to make so many mistakes along the way, bless him, it’s going to be one massive emotional rollercoaster.