There are quite a few TV shows that are unacknowledged ripoff of successful movies.
The Monkees --> A Hard Day’s Night and Help! Tales of the Gold Monkey --> Raiders of the Lost Ark. The Man From U.N.C.L.E --> Goldfinger and other James Bond films.
Funny you should mention “Quatermass and the Pit,” since John Carpenter’s “Ghosts of Mars” is clearly an unacknowledged reworking of that movie. And it’s much better than any other Quatermass movies except the “Pit” movie, which one of the very few movies to really capture eerie horror, rather than simple grossness, violence, fear, etc.
Sorry, no sale. The only pirate in Star Wars is Hans Solo who’s a good guy. The evil protagonist in Star Wars doesn’t have any magical afflictions unless you count having gone over to the dark side of the Force as an affliction, and the Sith Lord isn’t seeking a cure for being on the dark side. (Neither is Vader). And Princess Leia’s father is evil, but he’s not weak by any measure.