Although it may seem like an last-hoorah for the PSP, Square-Enix has posted a trailer for the once-Japanese-only title, Final Fantasy III.
This is presumably the same version that first launched for the Nintendo DS, as well as the iOS, given that the trailer links to the Japanese website for Final Fantasy III’s DS webpage.
No information on whether this port will be headed west as of now, but the dream of one day having Final Fantasy I-X on one handheld system would no doubt be desirable to many Vita owners out there.