If they get a 3D remake, the question would be, in which platform would they release them ?
If they were to remake it like FFIV/FFIII, PSVITA or 3DS should be the platforms, PS3/4, XB1/360 and PC are another good options.
But personally i would prefer Square to stop making remakes (like the FFIV,FFVI iOS/Android remasters,at most i would tolerate "ports" like FFX/X2 HDremaster or FFVII/VIII/IX in the PSNstore) and living in the past. I would like more new entries.