Square Enix remade III and IV and they sold almost nothing. They only did VII because developers had the incentive of doing something different, since remaking tit-for-tat is something that elicits almost zero interest from them, and even then it's barely outselling FFXV if that.
I'd say there's a low chance of a faithful, high-budget remake of any of these games ever coming out unless it's something like a gacha remaster, as it is the case for Ever Crisis and likely the I-VI Pixel compilation.