Luke crosses the return threshold by helping fellow rebel pilots destroy The Death Star. While the aftermath and the ceremony at the end demonstrate he is a master of two worlds and has the freedom to live. Yet while this concept of The Monomyth streamlined Lucas’ initial concept, it is not an accurate representation of the rougher story Lucas worked on in earlier versions.
Given an early draft’s name is Adventures of The Starkiller Episode I, it can argued Lucas contemplated the idea of turning Star Wars into a saga. In addition to the fact some of early ideas later made to the sequels and prequels which followed. Yet to suggest Lucas had conceived Star Wars around a film trilogy or The Hero’s Journey from the very start is an out and out fallacy.
The Hero’s Journey can be a good way to streamline a story, or sell and market a fantasy based film franchise. This has led to the belief amongst many young artists after 1977 that specializing in these are requirements for success. While some can pull this off, many others cannot. They have to work from the ground up, the same way George Lucas had to early on.