Producer Dino De Laurentiis initially insisted on an Eighties pop soundtrack for Conan the Barbarian, but director John Milius insisted on hiring his then-unknown school buddy Basil Poledouris instead. Basil proceeded to write one of the most famous classical music soundtracks ever made.
If Oliver Stone had his way, the film was going to be a Continuity Reboot set in the far future, with Conan battling mutants in lieu of or in addition to ape-men. Milius insisted on keeping the setting in the Hyborian age.
A sequel written by original director John Milius titled King Conan: Crown of Iron was written in 2001 and was intended to be a worthy follow-up to the original film (it would have disregarded Conan the Destroyer entirely). The project was moving forward but put on indefinite hiatus when Arnold was elected Governor of California. Eventually the project was canceled.