Okay this is from Xboxgamers.com Rumor news this is the snip form that site,

UbiSoft Makes It Exclusive



This year, developers such as UbiSoft and Konami have changed the meaning of exclusive. Their dictionary states that any game that comes out first on a system and all the other consoles 3 months later means that the first console has the game as an exclusive. Of coarse, that’s not the true meaning of exclusive but it seems that UbiSoft may be changing its mind with the PS2 and GC versions of Splinter Cell. It seems that Mr Fisher will be sneaking onto Xbox, and become a console exclusive for our beloved box! Good news all around then! J


So I don't know if UBI soft will change thier mind I doubt it since The devolopers Said "Why" a PS2 version