Obviously, there’s a lot more differences (last I checked Wonder Woman doesn’t bust out into song), but it’s easy to see how Little Mermaid was a template.
Allan Heinberg spoke with Entertainment Weekly about his work writing the screenplay for Wonder Woman, and revealed that The Little Mermaid was a good blueprint when laying out the events of his comic book movie.
Both movies are about a princess who wants to leave her isolated kingdom to experience humankind after meeting a handsome man.
Hopefully, Diana can at least figure out that a fork is eating, and not combing your hair.