No, it may not happen, but just go with me on this:
As you all know, the mysterious countdown is almost over, and it won't be long before we see the "new vision" that Square-Enix is hyping. Even though I wouldn't be surprised to see yet another Nintendo-based announcement, or a relatively useless iPhone title or something, I'm thinking PS3 owners might be surprised with the unveiling. For quite a while now, owners of Sony's next-gen console have complained bitterly of Square-Enix's lack of support, and although they don't typically bend to fan pressure, we have to assume the constant negativity has had some impact on the publisher. Furthermore, they're kicking off 2009 with the Blu-Ray release of "Final Fantasy VII: Advent Children," and let's not forget about the very special PS3 bundle that goes along with it. Yes, it'll only be available in Japan, but it's rare to see S-E pay this kind of attention to Sony these days. On top of which, Blu-Ray could be the perfect vehicle for a publisher like Square-Enix; they tend to focus on heavy CGI, and it's far easier to jam all that information on the BD format than separate it out onto multiple DVDs.
This may be the reason why Final Fantasy Versus XIII remains a PS3 exclusive while FFXIII is headed to the Xbox 360. Now, we also know that despite all the great PS3 exclusives coming up, several are still unannounced. We assume that one of them is Team ICO's project, but what if Square-Enix is preparing something special for the PS3? You know, FFXIII for the PS3 is almost done; they have time to do something else with Sony's machine while they work on the 360 version of the game, so maybe they will do something special for the PS3 that's FFXIII-related. Who knows? But it's a fact that PS3 owners are long overdue for some good old-fashioned S-E respect, and we'd love to see it come with this "new vision."
Now you watch. The countdown will reveal a FFXIII comic book, or something.