IGN Article: Kojima Countdown to reveal new Metal Gear.

[Xxain]

Rainbird said:

Xxain said:
I wouldn't be surprised with PS exclusivity....they were very satisfied with MGS4 sales

And Kojima likes to make exclusives, so he can focus on one platform. But in this day and age, you never know.

and if its about Raiden pre MGS4..its definitely exclusive