Bit late to this but some things to note from history.
First off, there is no ever "final battle" between Sith and Jedi. Not on this board anyway, much like even the books. It will always keep going, it will never end. One side can pound the other to dust for a while but the other will soon rise again.
Second and more of a personal thing, if you do so happen to keep manipulating my character, good or bad, it may end horribly for Darth Vird. Jegy been around the block more times than most would admit and he is a bit fragile in the mind. If you let out the side of him again, you will...in probably some of the most horrible terms, create a monster again. I will leave it up to you but if you do, may the galaxy be wary of what is to come again.
Eslo Anderson