Actually Deviant Art would be the right place, but this needs to be posted in the project section of the forum. I also would make it more like a HD project of the fields of FF7, without the aim to import them (but of course with the opertunity). However, be prepared to get negative response since there are not really moders and some do know the destiny of the Chrono Trigger remake and Square Enix reaction on it.
I think that the Nexus community is very alive and may be a good start point, but FF7 moding is pretty unknown at this place, which could be changed, if we host more mods on this site.