Sony Bend were the studio behind Syphon Filter license, moreover they were in charge for Uncharted: Golden Abyss too. Currently Bend Studio are working on an unannounced PS4 game, some rumors pointed out about the nature of this game and apparently could be related to Syphon Filter. If you have got some interest about this game, please read these two previous articles published in VGleaks:
Tidux, a well-documented insider upon Sony whereabouts, stated that Bend Studio were working on a secret project until late 2012. The game was cancelled and the studio moved to their unveiled PS4 game.
Sony changed their mind about the PS Vita policy some weeks ago, could have been this cancelled game a PS Vita product? It would be plausible.