Dallinor on 26 May 2009
This was already posted here.
It seems that if it were a first party studio, only Incognito or Sony Bend would really be elegible. Although Sony Bend are said to be working on a PSP game and there is still a big question mark over Incognito, we don't know if that studio is still running, or at the capacity to produce another game.
Independent third party Lightbox Interactive is a possibility, as they have some form of PS2/PSP/PS3 exclusive in the works.
