none of the og games need remastering IMO. they are all perfect and best experience played in original release version. again, just my opinion. Secret of Mana, if i want to play that, i will see the original sprite art, i want to hear the original low res SNES chip soundtrack, not some newfangled remix with live instruments or whatever.
FFVII makes sense as a remake for a number of reasons. IMO it may be the only videogame that ever needs to be remade. look at the origins of FFVII, what it meant for gaming culture, how it transformed otherwise old fashioned 2D text & tiles RPGS into cinematic epics.
this was the first 3D FF game. it was not just a big deal for Square, it was a big deal for the industry. not just the cinematics were revolutionary, but the polygonal characters as well, and the cgi backgrounds, all of it expanding to a new, higher-def approach to storytelling than previous entries. the technical demands of 3 discs and the cinematic nature was a fundamental issue in the split between Nintendo & Sony. FF6 was epic but FFVII was undeniably cinematic. there have been fans requesting a remake of it for so long for those reasons. also for those reasons i think it will work pretty well with having a modern hd remake. it is a very potent game.