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).
Burnout was one of two racing games I got addicted too in my very short racing collection. :) The other being Need for Speed: Hot Pursuit. It would be nice to see a new entry into the series but I don’t know if there is a market to revisit the series with all the popularity of Need for Speed, Gran Turismo, etc. One could dream though.