Mines goes something like this
Main lineup:
Wolverine
Cyclops
Storm
Rouge
Gambit
Marvel girl
Iceman
Nightcrawler
The rest can be unlockables and DLC
Secondary lineup:
Bishop
Cable
Magic
Colossus
Psylocke
Archangel
Emma frost
Jubilee
Wolverine, Cyclops, Jean Grey, Phoenix, Storm, Rogue, Iceman, Beast and Professor X
Deadpool can make an appearance
Main Players:
Angel
Marvel Girl
Beast
Havok
Polaris
Unlockable after Level 3:
Banshee
Sunfire
Unlockable after Level 5:
Shadowcat
Magneto
Psylocke (Braddock)
Dazzler
Longshot
Unlockable after Level 8:
Forge
Psylocke (Kwannon)
Unlockable after Level 10:
Karma
Wolfsbane
Sunspot
Cannonball
Mirage
Magma
Magik
Warlock
Cypher
Husk
M
Chamber
Skin
Penance
Unlockable by beating the game:
Mimic
Rogue
Synch
I'll add Mr Sinister in it
I’m pissed there’s no beast
Main Game:
Jean Grey
DLC:
Magneto, Maybe
Main:
Nightcralwer
DLC
Jean Grey (Phoenix)
Morph
Mr. Sinister
Moria X
Professor X
Emma Frost
Sebastian Shaw
Goblin Queen
Oh i just had a great idea, if you have beat the game on an the corridsponing difficulties you unlock different rewards
So for easy mode
Beta: unlocks sabertooth
Alpha: unlocks Exodus
Omega: unlocks magneto
Beyond omega: unlocks Apocalypse
Phoenix
Unlocked In Part Two:
Quicksikver
Scarlet Witch
Kitty Pryde
Unlocked In Part Three:
Deadpool
Thunderbird
X-23
Forget Me Not
What do you think?