Only problem I see would be the title. Your story seems different enough to me. A lot of sci-fi things have something to do with Outlaws in space, the only thing that should matter to you is how your make your own story unique.
Hell, I'm even writing a book myself about this person who wants to be pirate king. Same premise as another pirate saga, but how its told is all its own. Unless you copy what they do verbatim, I think you'll be fine :D
Zero Escape: Virtue's Last Reward = best game ever made.







