X-MEN: the flagship
Cyclops
Jean Grey
Storm
Wolverine
Nightcrawler
Dust
Rockslide
Blink (surprise addition and they need a teleporter).



FALLEN ANGELS, mutants fallen from grace, or chose to leave the X-Men for various reasons, no longer officially part of the X-men. Stealth team, who operates secretly.
Archangel (leader)
Cable (first the kid to be replaced by the real deal later)
Kwannon
Frenzy
Unuscione
Hellion
Surge
Scanner (repowered and can teleport now as well)


NEW MUTANTS: The next generation of X-Men, combined of New Mutants and Gen-X members. Minus Chamber and Cannonball, who will appear elsewhere.
Mirage (leader)
Sunspot (2nd in command)
Magik
Wolfsbane
Karma
Cypher
Husk
Monet
Mondo
Penance
PS: This team would be a mixture of all former New Mutants and Generation-X members who are still around. Divided into 2 squads (sometimes more, depending on demand) that will rotate.



EXCALIBUR: It will have to be an UK based team.
Pete Wishdom (leader)
Shadowcat (give her her codename back) and Lockheed
Daytripper (Amanda)
Psylocke (Betsy keeps her name and armor of Outback period)
Banshee (Irish)
Pixie (Irish)
Chamber (English)
Spitfire and Union Jack for special missions



MARAUDERS: Call it NEW X-MEN, mixture of Carey's team and kids that need to shine. Based on New Utopia, somewhere in the ocean
Rogue (co-leader)
Gambit (co-leader)
Iceman
Cannonball
Namor
Loa
Anole
Indra
Ariel


X-FORCE: mutant CIA sounds like a perfect concept, I'd keep it as well.
Bishop
Sage
Domino
Armor
Neal Shaara
Vanisher
X-23
Warpath