Seconding No One Lives Forever. Just figure out who owns it and bring it back already.
Also want see a Dark Forces/Jedi Knight return. Played a little Battlefront 2 last weekend and it looked amazing, but I'm not a multiplayer guy. JK I/II and Mysteries of the Sith are all time favorite games. I guess The Force Unleashed was sort of the spiritual successor, but there's so much wrong with that series. Holding the ligthsaber wrong, the secret apprentice storyline, unlikeable lead character, dour tone, the QTEs, the short length.
Anyway, bring the DF series back. Re-introduce Katarn and make him work in the updated universe. Give us both third and first person perspectives. Make lightsaber combat as fun and fluid as a Dark Souls or Arkham game. And don't make it a movie sprinkled with gameplay bits.
But if they want a movie sprinkled with gameplay, remake Shadows of the Empire in the vein of Uncharted. I'd also have a blast with that.