In short: Don't create Mary Sues.
This is sad. All the actors, all the equipment, all marketing, all everything and you get a story, that is so shallow you'd measure it in Angström.
What could an actual good auteur have accomplished with all this.
When my friends and I saw Terminator, we immediately knew: That was a 6502 Assembler. Like on our Commodore C64. It somehow made the terminator smaller. But our computers bigger :)
I made this musicvideo for a live concert of Holst's Planets. https://vimeo.com/202727312
I "stole" a huge amount from paintings (Botticelli, J.-L. David, ...) and even statues (G. Bologne), Film (minority report), etc.
However, the story that combines all, was my own idea (the "transform" part), inspired by the mystical music of "Neptune".
Inspiration, theft, transformation and a lot of work That's my definition of being an artist.
At least here in Germany, we have normally a slightly different definition.
Low fantasy: A scenario, where Magic, gods and all other esoteric stuff does not play a big role. It might, however, exist as background.
High fantasy: Magic, gods etc is part of the story and not only background.
So it is not the question, in what world it plays, but what is part of the story.
Correct: Stories are sometimes shapeshifting between them.
Some of my top 100 that are never/seldom mentioned in any list:
Le dernier combat (Luc Besson)
Element of Crime (L. v. Trier)
Prospero's Books, A walk through H, etc (Greenaway)
Duelle, Meery-Go-Round (J. Rivette)
Dark Star (Carpenter)
The Holy Mountain (Jodorowsky)
Jabberwocky, Time Bandits, ... (you know those guys)
(and a series that I've seen as a child that gave me the creeps: "Les compagnons d'Eleusis")