I would very much like to see a Final Fantasy 9-2. Not literally. But just another attempt to go back to the roots and capture the essence of what the series was about. So knights and castles, turn based battles, character-driven story-telling.
They seem to constantly drift away from that and I wish they'd use a different IP to do so. The classic FF formula, as seen most notably between FF4-FF10, just worked. It didn't need to be changed.