The drafting of a story for a Conan film started in 1976; Summer conceived a script with the help of Roy Thomas, a comic-book writer and Conan expert who had been writing the character's adventures for years for Marvel Comics.
A redacción da historia de Conan comezou en 1976; Summer concibiu un guión coa axuda de Roy Thomas, un escritor de banda deseñada e experto en Conan que escribiu durante anos as aventuras do personaxe para Marvel Comics.