In a sign that fan-theory disease is even infecting creators now, Frozen’s directors told Reddit last year that Anna and Elsa’s parents survived that film’s shipwreck and went on to give birth to another famous Disney character. As director Jennifer Lee wrote in an AMA, “According to Chris [Buck, her co-director], they didn’t die on the boat. They got washed up on a shore in a jungle island. The queen gave birth to a baby boy. They build a treehouse. They get eaten by a leopard …†So, is Tarzan Anna and Elsa’s little brother? Buck went deeper into the idea in an interview with MTV this week, explaining that the theory was just a silly attempt to tie together a bunch of films he directed: “When you’re working on a feature, you have a lot of time to think about stuff because it takes four years to make one. I think Jen and I were walking to a meeting, and I just start to tell her the entire story … [I]n my little head, Anna and Elsa’s brother is Tarzan — but on the other side of that island are surfing penguins, to tie in a non-Disney movie, Surf’s Up. That’s my fun little world.†Fine, but we still need to figure out whether Arendell follows absolute cognatic primogeniture, or else we’ll end up with Frozen 2: The Very Complicated Succession Crisis.