It appears that Square Enix have NOT confirmed the release date of Dissidia Final Fantasy (Sony PlayStation Portable) & Kingdom Hearts 358/2 Days (Nintendo DS) to be 31.08.09. Click here to read previous article.

A Square Enix representative has been on hand to squash these rumours about the release date:

No, that is not correct

We don’t have a launch date for [Kingdom Hearts] yet… hopefully that will come in the next couple of months.

Dissidia was announced for mid-year 2009, and also doesn’t have a release date.

Source: GameCyte