Rather than a complete relaunch, I figured I'd try and reshuffle the rosters of existing titles (with a couple new additions). I'll probably change my mind in five minutes but these seem like pretty solid rosters and a nice balance of characters in terms of powersets, and I've made sure there's no overlap of characters.
X-Men Gold
Rogue
Iceman
Cannonball
Magik
Northstar
Jubilee
Armor
X-Men Blue
Magneto
Polaris
Danger
Quicksilver
Mystique
Frenzy
Elixir
Mondo
X-Men Red
Jean Grey
Storm
Nightcrawler
Gambit
X-23
Honey Badger
Gentle
Pyro
Astonishing X-Men
Havok
Dazzler
Beast
Colossus
Warpath
Siryn
Justice
X-Force (replacing Weapon X)
Cable
Domino
Daken
Boom-Boom
Shatterstar
Rictor
Wolfsbane
Uncanny X-Men
Psylocke
Angel
Bishop
Dani Moonstar
Banshee
Sunfire
New X-Men
Hellion
Dust
Surge
Mercury
Rockslide
Anole
Pixie
+ guest-starring other students at Xavier's (Bling, Loa, Trance etc.)
+ guest-starring members of the original Gen X and New Mutants as mentors.