Woo. Another Final Fantasy is coming out on PSP. I've "woo" 'cause I'm a PSP user. :)
The game is titled Dissidia: Final Fantasy. The game is an action game currently in development by Square Enix for the PlayStation Portable as part of the campaign of the Final Fantasy series 20th anniversary. The game features characters from different Final Fantasy games participating in one-on-one battles. -cited from Wikipedia.
From my guts, this is going to be a big hit on PSP users since FF is a great game. Let's take example of the Final Fantasy: Crisis Core. It sold 350,000 copies in Japan on its release date, including the 77,777 Limited Edition PSP/Crisis Core bundles, making it a best-seller.
Basing from the news about FFVIIICC, I'm guessing that Dissidia would be the same or maybe higher. But whatever it is, we FF fanatics will never gave up on hope that our final fantasy will still go on that it would not be the final.