http://www.ff-type0.net/
Yoshinori Kitase sat down for an interview with German Magazine M Games and has revealed that the title is still in early stages of developement, also saying that he would like the remake to have the same quality as the original.
I infer from this that they're doing at least a little bit more than a straight HD upgrade. Probably improving some textures and backgrounds.
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Who knew the Rivalry Rumble would be so predictable? SuperNiceDog, that's who.