There are some crazy theories out there that Frozen, Tangled, and The Little Mermaid are all connected, so the show could capitalize on that and sneak in a friendship between Rapunzel and the sisters or have them know of Ariel because of their parents' boat crash. It's a long shot, but if there's a way to have familiarity between the characters, it would be interesting.
Cross-Fairy-Tale Connections With Other Characters, Like Ariel
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