It shouldn't be that hard. Star Wars lends itself quite well to literally any and every video game genre. Clear the story with the Lucasfilm Story Group and make an authentic Star Wars game.
Personally, I would love a new Rogue Squadron game, maybe even one set in between the OT and ST, even have us transition from T-65 to the newer T-70 X-Wings throughout the course of the game. Criterion has already built an excellent flight system with Battlefront 2 and Dice has most of the vehicle models made, it'd give any studio a huge head start. Only things they'd to tackle would be story specifics and level design.
Alternatively, a Jedi Knight game. Everyone would go crazy for it, and they have so much available space in the Star Wars time line to work with. They don't even need bring back and focus on Kyle Katarn (although I'd love them to). They could bring it back to the Prequel era, or some time before then.
Save the open world for a new KOTOR game. And throw a new Empire at War at us while they're at it.