Rapunzel is portrayed well in this film, though her character still has potential for something else. I am not sure what, but I feel there is still room left for her to do another movie. Perhaps a meeting with Anna or Elsa, who are revealed to be her cousins?
Those three could have heir own role in a totally new story where a family crisis has occurred, and the two blondes with powers go into action, and Anna feels left out. Then she hears that they are in a desperate need of rescue, and Anna must somehow find a way to help them that does not require magic (or cliches)! That would be great, if done right. Usually, Disney is a extremely lazy when it comes to sequels. However, I think those three girls need more spotlight. Same goes for all the other princesses. Bring them back for a modernised sequel to their classic film. Will Snow White be a good Queen? She is only fourteen after all!