I've actually heard Zelda was inspired by this movie... and it's quite a lot of similarities..
The hero is Link
The damsel in distress is Zelda
The villain is Ganon
Or maybe not quite, but they basically fill their archetypes in the original game.
I miss classic adventure movies like this. Wonder if they can come back...
Legend is a great film but none of these comparisons align with the movie.
"Jack" is a wild child/nature boy that associates with brownies and fairies exclusively and doesn't know much about civilization. He is lured by Lilly into doing things against his better judgment/nature because wild child or not, he's still a young dude and making decisions with his hormones, not his head. He's not a warrior in any meaningful sense and displays little skill with the weapons he's given. He gets REALLY lucky with Meg in the swamps and that's about it.
"Lilly" is a VERY spoiled, oblivious individual that thinks more about her own wants and comforts than anything else. She *appears* more innocent than she actually is. This disregard for anything other than what she wants is what causes her to touch the unicorns when told not to, which is what gets one of them injured, setting up the film. the forces of Darkness exploit lilly's weakness and desire for the comforts and spoils of her former life when they corrupt her in that "dance" scene, which is DEFINITELY a metaphor for something else.
"Darkness" is less of a villain here than a force of nature. It's the "darkness within everyone" made manifest and can never truly be defeated, but it DOES still feel "love" in its own way and that is essentially it's downfall. It believes that its seduction and subsequent corruption of lilly was more successful than it actually was. You can hear Darkness laughing over the ending of the (US) Theatrical ending, implying that he's really not stopped at all by the events of the film, despite the setback with the unicorns.
I'm not sure *what* Zelda lines up with all that. It WOULD make a good game if someone could do it justice.