I assume we're building up to a Darth Revan ...

I cant see us needing bastila fallen for darth revan as he was a jedi while she was a sith apprentice to darth malak. At this point revan had already fallen and returned to the light. While badtila was a sith apprentice she wanted revan to return to the dark side but he brought her back to the light with the bond they have together. So based on that I believe we will be getting darth malak before revan which we will need these new toons for