I think you should start as a Jedi Padawan or dark Jedi Padawan. You do some official Jedi business for a bit, but while you are doing this you learn of the new threat from the outer rim where Revan and the exile went. Against your masters instruction you seek them out.
Along the way through dialogue and stuff you establish if Revan was light or dark and if the exile was light or dark, and maybe establish what they looked like.
During your search to find where they went you get the two droids and maybe a few returning characters from the first 2 KotOR games. I’d really like to see Jolee Bindo!
You finally meet up with Revan and the exile who have gathered many Jedi and dark Jedi to them to face this new threat. You defeat the new threat and the KotOR series is over.
*Play Star Wars Theme*