Yeah, it isn't the greatest idea since you've got quite the immersive universe going on here. I have a question, could I borrow your idea of an alternate universe as you've portrayed? There'll be some diffrences, but the concept will be the same.
As long as you leave my characters alone (this includes the alternate Carth, Bastila, and Revan), and don't interfere with my story, I don't see a problem with it. It's not like the idea is the most original thing in the world. Have fun!
~ In a world not quite our own in a time like none we've seen, the growing dark looms over the huddled masses of Man. ~
"Beware the form-fitting black armor-clad Drow hottie with twin Mineral II Greensteel Khopeshes!"
"Liella d'Orien says, '"You're the fool, Devil. -- Witness the power of this fully ARMED and OPERATIONAL Titan!"'"