Could Microsoft make a Crossover Fighter

[Ronster316]

Master Chief
Arbiter
Joanna Dark
Marcus Fenix
Alan Wake
General RAAM
Numerous Killer Instinct Characters
Banjo and Kazooie
Splosion man
Conker
Jason Fleming (Shadow Complex)
Fable characters
Crackdown agent

They have the roster, i just don't see it happening.