The structure of most stories fall into one of a few categories; in fact Kurt Vonnegut's rejected Master's Thesis was based on cataloging those categories and diagramming their structures. http://www.openculture.com/2014/02/kurt-vonnegut-masters-the...
Really what makes it interesting is in the telling of the story. Did you end up writing Star Wars: A New Hope or another I Love Lucy episode?
Then again, that first Star Wars movie is mostly taken from Kurosawa's The Hidden Fortress (https://en.wikipedia.org/wiki/The_Hidden_Fortress), right down to the personalities of the robots... I gather The Dam Busters and perhaps other films of that sort (none of which I've seen) get a lot of credit for the end.
"Mostly taken from..." is really stretching it. Yeah he was inspired by those movies, but to say "mostly taken from" is ignoring all the things which is original about the movie. And Star Wars really was an original movie when it arrived.
If you look at Shakespeare almost all his basic story lines (and many characters) are taken from history or from other plays or stories. That does not mean that Shakespeares plays are "mostly taken from" earlier sources.
Really what makes it interesting is in the telling of the story. Did you end up writing Star Wars: A New Hope or another I Love Lucy episode?