TimeSplitters 4 needed to happen because it's TimeSplitters and there's never enough of that, but it got canned, also BattleFront 3 would have been fantastic but that was being made by the same guys that were making TS4 and it also got canned, curses!
And I would love to see a continuation to Empire at War Forces of Corruptions, I wanted to see what happened next, seriously if there's a book or a comic about it someone tell me, though the game itself was just OK, it was good fun but the only strategy that I needed was doing raids with all of the heroes and it worked every single time.
Also for another thing space related that isn't Star Wars, FreeSpace 3, and I'm pretty sure I don't need to explain this, it just NEEDS to happen, but if I must, if Space Sims come back, why not start with the best of them?
But it has to be for PC, because as much fun as flying that ship was I only made it through the campaign by using squad tactics because I'm an awful shot, but man did I feel smart every time I finished a mission and no one died even though it said I only shot 1 ship down in the entire battle, and I'm serious I'm that awful a shot I normally only had 1 kill and I finished a lot of missions with 0, I'm pretty sure my highest kill count was 11, which if you have played that game and passed it you know it's pathetic.