On the other hand, B&B is a really popular Disney cartoon, and A&E might not want to disappoint fan-girls of the Rumple and Belle pairing. So maybe the writers could find a way to wrap up Rumple’s story without necessarily killing him off, and instead write him as having his curse undone by TLK
This actually reminds me of Beauty and the Beast. Rumple never really dropped the Beast. Maybe Rumple finally losing the Dark Curse could reintroduce that story.
As far as Belle leaving Storybrooke, it would be a shame if they didn’t develop Belle’s character further. I had hopes when they introduced the mystery of her mother and her relationship(?) with Will