The last poll was Nov. 8, and was down to Gwen, Wanda, Lorna (whoever the fuck that is), and the fat buck-toothed chick...
Look, I like Doreen, I really do, but I wouldn't fuck her even if she showed up in real life and gave me a shot. Seriously.
At least Doreen is actually a mutant. I think.
While I could be wrong, from what I can tell Wanda isn't an actual mutant (although she was thought to be one for a time).
Out of X-Men Evolution we only had Kitty, Rogue, Jean, and Storm to work with as *actual* X-Men.
However expanding to the rest of the show we had Jubilee, Tabitha 'Boom Boom' Smith (mentioned in game as having an "incident"), Amara 'Magma' Aquilla, and Rahne 'Wolfsbane' Sinclair among the New Mutants.
Emma Frost was actually supposed to join the show in the next season, as one of the X-Men. Laura was on the show and is a proper mutant (naturally).
Expanding to the X-Men comics we have Illyana 'Magik' Rasputin, Elizabeth 'Psylocke' Braddock, Alison 'Dazzler' Blair (although she is in the game already with the book "Dazzler and Longshot", so perhaps not viable), Cecilia Rays (a mutant, but not interested in heroics, likely as another staff member), Kwannon (either as 'Psylocke' or 'Revanche'), Danielle 'Mirage' Moonstar, Heather 'Lifeguard' Cameron, Paige 'Husk' Gutherie, ... frankly there are a lot of options if you go into the comics.
So honestly, there are choices still, its just that we've pretty much seen all the well known ones and from here they start to get progressively more obscure. One of the two Psylockes would probably be the best bet as a known character and actual Mutant.
And I just came here to find out if there had been any developments on the Prime Mod front...