[New enemies in KOTOR III]

Maybe in KOTOR III, the Yuuzhan Vong will be introduced. After all, they would fit in rather perfectly. Their coralskippers fit in as the asteroid ship that Canderous chased in KOTOR, and the new enemy that Revan is searching for could be the Yuuzhan Vong.

[KOTOR III (Possible Story)]

I think, that KOTOR III should at least contain some reference to Darth Plagueis, Darth Sidious'master. It makes sense, being that Sidious makes a reference to this ancient Sith Lord, who learned how to create life. If so, then Sidious could be the connection between the KOTOR series and the Prequel trilogy. The Exile could even become Lord Sidious. Or maybe Revan becomes Sidious, explaining Sidious'seemingly obsessiveness over Darth Vader's suit. Anyway, just a thought, and you can feel free to critique it, as this is not my definite prediction, just a possibility not explored yet.