Parasite Eve. I felt that it was way underrated in my opinion and it deserves a nice touch-up for the newer consoles. Square Enix is in production of making The Third Birthday for the PSP, but I'm sure it won't feel the same as compared to a console release.
Also, Pokemon Gold and Silver for the Nintendo DS. Nintendo has already remade Red and Blue (Fire Red and Leaf Green), now give the fans the remake that they really want, only on a different portable system than the GBA. Chikorita, Cyndaquil, Totodile...all the Pokemon from the original, only in a new version with alot more features.
And lastly, a remake Lunar: Silver Star Story Complete, an old Playstation classic that people might not well remember. It's just too bad that Working Designs is out of business. But if a remake of this game were to happen, then it would definitely be better than that shit Dragon Song a few years back.