Ok, these are my top picks for who I want as Black Queen:
1. Storm - because I love her sharing power with Emma as co-leader.
2. Jean Grey - because it would be too awesome!
3. Kitty - just to see the sparks fly at meeting and having Kitty be forced to wear the outfit by Emma!
4. Mystique and/or Destiny - to keep building on the alliance Mystique and Emma already started!
Honestly, I can't think of any other female characters I would like as Black Queen. I hope it's not Selene because I honestly don't think that Selene would ever side with Emma, she would kill Emma at the earliest opportunity.