

If by capital “R” Remake you mean the full three-game treatment FF7 received, Kitase’s already said they’re not planning on doing that again. Future remake projects, should they happen, will be smaller in scope. An FF9 project was leaked twice and is heavily rumored, so it’s most likely next (if it wasn’t quietly cancelled, anyway). We also don’t know exactly where it would fall on the spectrum between remaster and remake, but the Epic leak suggests it’s more of a remake.
FFT is the one I’d like to see the most, and it has even more rumors around it. But, I would expect that would look something like Tactics Ogre Reborn, mostly a remaster. It could really use some modern features, like a move undo and some UI enhancements, like a helper for zodiac signs. What I want the most from it is an orchestrated soundtrack. It’s a gorgeous work that deserves the full treatment. I’d also love to see more content, like extra side quests, but I’m not holding my breath on that.
FF6 is the most logical next step after those in terms of enduring popularity, especially if they want to target the Western market. It would probably be super controversial in the fandom, though.
Like you said yourself, it’s risky.
That said, I think SQEX is one of the better large publishers out there about giving ideas some leeway. Hell, they let Yoko Taro make really fucking weird shit for far longer than was reasonable until it finally paid off with NieR: Automata.