Board Thread:Spoilers!/@comment-2153169-20140908192157/@comment-2153169-20140913200110

Frozen presented the King and the Queen as the princesses' parents, but it never said if one of them is really the sister of the other or if one has been adopted. We just know they are their parents; but biological or not? Never precised. They could use this detail.

But I'm not a fan of the idea, I hope they won't use that idea ^^