Probably at least a year out.
They haven't shown any of it at all yet, which means it is no where even close to finished (possible not even byond planning stages).
Since SE generally does not release things during the holiday season to avoid compitition ... January-Febrary 2014 would be my guess, although if the planets align and they actually work fast (HA!) summer of next year would be best case.
But then, of course, it will be so close to the release of the PS4 that they may hold it off to put on that platform 
Well one thing we know about Square from the past is that they don't like to talk about a game until they ready to talk about it. In the past when games have been under development, PSU and fans alike have contacted Square's public relations about whether games are still in development (such as a Final Fantasy VII remake) and Square oftentimes responds with blunt, short answers such as: "We have no information to share at this time." Whether this is a corporate strategy move or that they simply really don't have an answer is another story.
I think they avoid confirming anything too early because as we all know, we Final Fantasy fans do cling to new games and expect Square to deliver what they say they will. So if they start saying they will have something done before they are certain, it will only cause an uproar in the community.
But on the other hand, keeping us all totally in the dark just makes people push Final Fantasy games to the side in favor of other developments that they can get excited about because there's more information readily available. So it should really be a balance from Square of maintaining excitement, not giving away information too early, but also not totally keeping the fans in the closet about the developments.
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