Thing is, a game that covers a long timeframe means everything would be touched really lightly. If not it would either be a game that is really only several somewhat related chapters.
Obviously, you can technically make a game of "father and son" and the like about a family with Jedi tendancies. Think about a katarn but with also morgan, actually make the main character(and bloodline) a Horn-y guy and you will be all fine. :3