I suddenly wish for a Freelancer esque game based in Star Wars.
I want Elite: Dangerous with a Star Wars skin on it.
I want elite dangerous that isn't insanely boring.
That is already out there. Elite is only boring if you make it boring. A lot of people have problems with sandbox games to actually do something which they like instead of doing something which advance their credit account. Sounds almost to much like the real world. ;-)
edit: Though I totally don't want a star wars sandbox space sim. I rather take a more interesting approach like Star Citizen for that. Though I totally would love to see a classic co-op campaign setting with X-Wings. This time maybe a little bit more Wing Commander like with branching campaigns and episodic DLCs and 8 player co-op. Battle at Yavin or Endor in modern graphics and old school X-Wing gameplay would be awesome. Even better if you add options to play imperial vs rebels pvp on those missions.
Co-op campaign would be nice, but can we make sure there's also enough content for a decent single-player campaign, as well? Some of us don't like our games to be unplayable just because the Internet's out or no one happens to be on at a given time.
LAN co-op is a must. But a special single-player campaign? Nah. A decent mission design with adjustable difficulty levels means in a space sim that it just works regardless of the amount of players. It just makes so much more fun to fly with your friends. Squad chatter and all included.
Example: Starlancer. The last few missions might have a "git gud" feeling when flying alone, but once you actually got good … well, a highly rewarding experience. And in the case that you did not got good; you just invited someone who actually was good into your game and solved the mission together.