I called this three years ago. I doubt the game was ever even in full production at any point in the last four years. Square Enix always prioritized shorter, less-ambitious projects at the expense of it. XIII, XIV, XIII-2... and it's likely with XIII-3 and XV coming over the next couple years that they realized there was no point in finishing it when it had taken this long to even get off the ground. That game never had a chance.
No offence but saying "I called it" doesn't mean much. In SIX year all we have got was an anouncement, a Famitsu article and a trailer in 2011.
XIII was not less ambitious by any means, if anything Versus is the experimental project, XIII it took more time than any other FF in history to develop and it was ridicoulously expensive to make.