Board Thread:General Discussion/@comment-28447977-20160522154017/@comment-25926288-20160522212447

It's rather simple.

True Love's Kiss breaks curses. Rumple has the Dark One's curse. If Rumple wakes Belle with True Love's Kiss, it would probably break his curse.

Now, I don't know why Belle put herself in that ultimatum because Rumple shouldn't have to give up power, just stop doing bad things all the time.