Putting this game on Xbox 360 would be against Kojima's wishes.
Nobody goes against Kojima's wishes. Nobody.
Even if it's technically possible (which I personally don't think it is), it's NOT HAPPENING. I'm not going to spend 2 hours explaining why because I've already done that at least three times.
You know what? Ninja Gaiden's main series will come to PS3. I have no proof, there's really no point, but it will happen.
Do you see what I did there?
Honestly, when it's a PS3 exclusive, you call it a boring movie-game, but now there's a slim to non-existent chance of it coming out on Xbox 360 and it's suddenly a god among games?
Yes, I'm generalising. But how many X360 owners called this an excellent game back when there was no comment saying that Konami was making a game for X360 which was apparently interpreted as "MGS4 IS COMING TO THE 360!"