I was just thinking about the history of the Final Fantasy series, and their latest release being FFXIII-2 and future release Lighting Returns: FFXIII. We've gotten FFXIV (another mmo), and still expecting FF vs XIII sometime in the next decade or so, but what about XV? If Nomura is busy working on Kingdom Hearts and Versus, and if there was to be a new director logically XV would be the next step right? Has anyone seen the Agni's Philosophy video?
Many people speculate that AP is actually a teaser for FFXV, despite Square-Enix's adamant denials. I think it 'could' be related to XV, in the sense that perhaps the same elements used in the video could be present in XV. As of right now there is nothing known about a potential Final Fantasy XV, only rumors and speculation. However, I think that we will hear something by mid/early 2013 - and because the date will sync up perfectly, I think SE might try for a 2015 release of the 15th installment of the series (or at least an early 2016 release with a 2015 full reveal).