I agree that they won’t split Rumbelle up again at this point in the storyline. If they want to keep him progressing and developing, he needs her influence. Belle will be sticking around. I’m still reserving judgement about whether or not Rumbelle leave on the boat with everyone else though. That’s what intrigued me about the alleged spoiler that Belle may not leave on the boat. If that happens to be true, and she doesn’t go, then Rumple won’t go either, because he wouldn’t leave her. A few people have mentioned over the last couple of pages that Belle hasn’t been tied in with other characters’ storylines much. If Rumbelle end up in FTL searching for Nealfire, Belle would likely meet up with Mulan again, which would be a nice little continuation of a relationship Belle has outside of Rumple
I think this is an interesting thought but it would mean that the Rumple/Hook drama would be on hold and with Hook and his story becoming more prominent in S3 (we assume), I think a major part of that is how Rumple and Hook will continue to interact.