As of right now, we need pretty much everybody. You don't have to play a cannon character, but if you want too here is a list.

X-Men:

Charles Xavier

Cyclops - Scott Summers (Taken)

Storm - Ororo Munroe

Jean Grey (Taken)

Angel - Warren Worthington III

Beast - Dr. Henry "Hank" McCoy

Colossus - Piotr Rasputin

Iceman - Bobby Drake

Nightcrawler - Kurt Wagner

Rogue - Anna Marie

Shadowcat - Katherine "Kitty" Pryde (Taken)

Wolverine - James "Logan" Howlett

Gambit - Remy LeBeau

White Queen - Emma Frost

Forge

Havok - Alex Summers

Psylocke - Elisabeth "Betsy" Braddock

Wolfsbane - Rahne Sinclair (Taken)

Sage - Tessa (Taken)

Blink - Clarice Ferguson

Morph - Kevin Sydney

Siryn - Theresa Cassidy