There is this theory going around that the frozen sisters and tarzan are brother and sisters. Anna and Elsas parents were going on a boat trip and maybe while they were on their boat trip they found out they were expecting? There is the seen in Frozen where the boat sinks, but what if the boat made it to an island wrecked but the parents were still alive. Like tarzans parents in the movie where they end up stranded on a island with BABY tarzan.
