For me personally, I would love to see the Resistance series get some love. A collection with all the titles, including PSP, added together with upgraded graphics would be nice but I would really love to see a new entry into the series.
It’s that or Legend of Dragoon but that’s a real long shot.
Not as a remake, but I’d like to have the previous Tekken games available on one console. So Tekkens 3 to Tag 2. The one I’d like most is Tekken 4 though.
Racing game-wise, as a remake or re-release, I’d love Burnout 3 and Burnout Revenge (though it’s not strictly Playstation only).