I wouldn't mind a singleplayer FF game set in Hydaelyn/Eorzea after FFXIV has reached the point FFXI has, but as for a sequel in another MMO I'd rather a new take be used, that way we can get a FFXIV "Manderville's Rhapsody" event.

Joking aside, Square has gone on record during quarterly reports saying that FFXIV is still profitable that another MMO would probably be a detriment to resources that could be better spent on keeping this money train zooming and that no new MMO is currently in production. However I would not be shocked if a different kind of non-MMO multiplayer final fantasy game will be released at some point.