One of the film producers said on Reddit that the Frozen parents died on their wedding, which I think definitely confirms that part of the theory, at least. Common thought is that Anna and Elsa are cousins with Rapunzel, although it's a bit unclear which parent is biologically related to Rapunzel's mother.
All of us 20 year old guys singing Let It Go all the time.
Now I'm beginning to wonder if ALL Disney movies are connected somehow. I know that Disney is known for putting cameos of Disney characters in other Disney movies. Micky Mouse was on The Little Mermaid and Belle was on Hunchback of Notre Dame. You have to really closely.
