You know, with Quick Silver and Scarlet Witch being in Avengers 2, I'm curious if they'll just lift the backstory of the Strucker twins, Andreas and Andrea, who's father is Baron Wolfgang Von Strucker. While not the actual Quick Silver and Scarlet Witch, they are mutants experimented on by Arnim Zola, and I could see Marvel using it to make composite characters who fit in with the movie universe, while keeping away from the X-Men stuff.
Andreas is also known as Swordsman. And Andrea never had a codename as far as I know.
http://marvel.wikia.com/Andrea_von_Strucker_(Earth-616)
http://marvel.wikia.com/Andreas_Strucker_(Earth-616)