I think that you should continue the story as the Exile about 7 years after Kotor 2. You have rebuilt the Jedi and are once more thriving. But there still is the Sith who are attacking the Republic in the dark. So the Exile needs to find Revan in the Unknown Region. To find Revan you have to persuade T3 to show you on the Ebon Hawk where Revan had traveled. So you travel out into the Unknown Region in search of Revan. In the Unknown Region their could be many more planets, exotic wepons, new alein species, and also new threats to the republic.
Thats what I have so far.
