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Need a word for an interesting idea

Was talking today with someone about this:

A movie comes out (Movie X) and is very influential. Many other filmmakers copy the style or the elements of the story, making films Y and Z.

If you see Y and Z first, and then see X, X seems derivative, even though it is the originator of the ideas. If you didn’t know the backstory, you’d think X was a knock-off, even though it’s the source.

Anyone know a term for this? Prestige Inversion? Creative Inversion? Looking for suggestions.