Board Thread:Spoilers!/@comment-2153169-20170909025746/@comment-25926288-20170921192644

LadyTremaine wrote: There is also the possibility of Rapunzel being the other stepsister... Which i think it's nice. But if she is LT, would be something like Rapunzel Tremaine right? Depends. She could have changed her name, that was a nickname, and/or she her her own previous last name. Cinderella/ Ella Tremaine is likely Cinderella's if her father is Lord Tremaine.

One major thing to look out for is when Rapunzel was taken and when will she return. However, none of that explains why Lady Tremaine is striving for royalty. So, it's very complex.