Final Fantasy Versus XIII's PS3 exclusivity has been brought into question before but now more so than ever thank to an interesting tweet made by Tetsuya Nomura. The man decided to talk a bit about the process of multiplatform development.
Specifically, Nomura discusses the difference between developing multiplatform titles and the porting of games from one platform to another,
"Multiplatform is when you start development on a game with the assumption of optimizing for multiple platforms. Porting is something that's done after you've developed a game specifically for a particular platform. The debate over porting is decided by the management based off the current market and the costs. All I can say right now as a developer is that Versus is being developed specifically for the PlayStation 3."
We aren't sure why Nomura suddenly decided to talk about porting and multiplatform optimization, it sounds a lot like Versus may see the same fate as Final Fantasy XIII. If anything, Nomura assures fans that Versus is definitely a PlayStation 3 game until "management" decides otherwise and should that happen, it'll just be a port, much like Final Fantasy XIII.
Thanks to RedRose for the story tip.