Based on the idea that Arthur of Camelot is the Once and Future King, and would one day return to fight evil and rule with equality and justice once more, I've been rolling ideas around for a game set in the LANCER system, where you play as the newest incarnation of the knights of the round table. I wouldn't specifically request an arthur analogue unless someone naturally arises as the leader other characters look toward. I'd be looking mostly at the idea of the round table as a band of equals, with none at its head. A group establishing a base of power and slowly expanding their reach and obtaining allies as they bring order to an embittered, wartorn galaxy.
I'd be using a faction system from another game, likely Stars Without Number or Pendragon, to increase the feel of rebuilding the camelot of old, so you can feel tbe effects of recruiting NPCs, gaining ground against your foes, etc. This isn't something every player needs to engage with, if you just want to focus on your pilot and their story, but will be there as an option for those with a tendency towards the broad.
In addition, depending on how many players I had, I would run it one of two ways: West Marches style, where pilots can mix and match between groups to take on different missions at once(if I get a full round table), or by introducing NPC knights as the campaign goes on and you recruit a full table, allowing you the chance to play as them if a battle needs a different skillset, or send them out to do faction stuff between missions, or even upgrade them to full PC if you take a liking and want to play them permanently.
Is this something that might find an audience?