Here's a thread for off the wall ideas that don't quite fit into suggestions for standard expansions. It would have been a great topic to suggest that they put out a campaign. But, of course, they've done that.
But what else is off the wall, which would be cool, in your opinion?
Mine for right now is an expansion with landing craft - the ships that drop troops and walkers down on planets. They would not be worth many points, or be combat viable, but might come with objective cards that override the normal objective cards. Points for all landing craft that fly off the opponent's side of the table, or for your opponent if they destroy those ships.
I think that would be cool anyway.