Maybe teck in one of these
Magneto, House of M
I like Sabertooth at 4 though, but I'd run Blob before Anne-Marie in this build.

I've done quite a bit with Big Brotherhood in the past. Here's an article I wrote about it. Honestly, I think you should not discount the Freedom Force characters before testing them in the build with the plot twist.

http://www.vsrealms.com/forum/showthread.php?t=58307

My Freedom Force deck was one of my favorite is not good modern decks at the time of x-men.

I would definitely consider Stonewall on 5 or Mystique on 6, but I don't very much like the other cards. Still, Stonewall might be a decent replacement for Quicksilver, and I'm thinking I might need a 6-drop in there somewhere.

A vast improvement over the last build. It has great potential.