If EBGames is to be believed, we'll be seeing Dissidia: Final Fantasy coming at the end of August later this summer.
EB has http://www.ebgames.com/Catalog/ProductDetails.aspx?product_id=73850 the game to ship for an August 31st release.
Of course, an EBGames listing doesn't confirm the exact date of release, but it does give us some clues as to when we can expect Dissidia to release.
Hopefully, Square will shed new light on Dissidia as I know many of us are growing anxious for new information, mainly a solid release date. More PlayStation 3 News...