Remember the Shivans from Freespace? I'd love to see them make a mod appearance in Sins. I always thought they were a fantastic villain, and when I read about the Vasari running from "something" it was the first thing that popped into my head. Not to mention that their ship designs were cool and omnious. Heck, for that matter, throw in the Terrans and Vasudans...why not a whole Freespace TC.