Ed Boon doesn't seem all too turned off by the idea either ...
Source - Gamespot
Xbox boss Phil Spencer has spoken up to say he "love" the idea of a Killer Instinct/Mortal Kombat crossover project, though nothing may be in the works.
Spencer's comments came in response to a tweet from NetherRealm boss Ed Boon, who said he's a fan of Killer Instinct, but a crossover would need to be exclusive to Xbox.
Source - Gamespot