However, just as Lucas could not secure the Flash Gordon rights so went on to make Star Wars ... perhaps if you create your own universe drawing inspiration from several other sources, you will have something more interesting that won't rely on an existing fan-base for pats on the back? Or perhaps you should approach Lucasarts and see if they are interested in doing the donkey-work of creating the game and you might get some recognition from the industry?
Reach for the stars. You might not get one, but you'll come up with more than a handful of mud.