You should start by picking the Exile's gender/alignment. (It doesn't need to be subtle)
Then, you see a vision of the end of KOTOR 2. (Including cut content. It'd be a good way to show people what was supposed to happen.) Then, you show a little bit after the end, and what the Exile does. Then you could have some "5 years later" message or something, and start playing as your main character.
Or at the very least, be able to put your hood up.