I sure hope he isn't playable. Bosses are lame playable characters, and are usually a cheap way of winning. Unplayable bosses have an intimidating factor that makes them seem a lot more powerful and threatening. But, If... IF he is playable, he better have a different boss, like Raiden. I think good guys should fight Kahn and his minions, and bad guys should have to fight Raiden and his team. I always find it odd when good guys fight other good guys.