Ooops...other way around. El Dorado was a remake of Rio Bravo
Rio Bravo was a blatant attempt to curry favor with a new audience by using Dean Martin and Ricky Nelson
Movies are symbols. Symbolism is key. High Noon symbolized actors being persecuted by the anti communist movement in Hollywood. Rio Bravo (which preceded El Dorado) was the Hollywood conservative’s retort to High Noon.