Sorry to say this but this storyline will not work in any way.
A good storyline should make it possible to select the gender and alignment for both Revan and the Exile.
In my case, Mira was dead. My exile is DS. And Bastila isn't dead. Revan is LS male. Then you speak of two PC's?
I think the story for Kotor III should pick an alignment for Revan and the Exile "for the duration of Kotor III" like, "something happened in the unknown regions which forced themselves to choose an alignment."
IMO Revan LS and Exile DS.