IMO, the safe money is on XIII-3 getting a Japanese release date and another iOS title to cash in on (maybe a Versus prequel chapter or some horseshit). The unlikely bet though would be Versus getting renamed XV and a prequel iOS title cash in (they've abandoned everything else about that XIII compilation thus far, they just need to finish it off with a Versus conversion), which I'm falling back on in case
Batman Lightning Returns comes out before then. The "Goddammit Japan!" bet would be an FF heroine dating sim (or god help us, an FF hero Otome game) because the FF brand has been slapped on games from every other genre that doesn't take effort to make (they haven't made an FF themed platformer yet, but I'm not going to hold my breath on that one since that would involve effort on Squeenix's part). And finally the "It's too goofy to not be a distinct possibility!" bet is when Squeenix reveals XV and it turns out to be a Browser based game like Farmville.
Honestly though, I just want those 3DS remakes of FFs V and VI already.
Fake Edit: Plus you know that when Squeenix inevitably rename Versus into XV they're going to come up with the cheesiest/Engrishy justification for it (Future Quote; Squeenix Guy: "So the 'X' in the number stands for the ties XV shares with the epic XIII saga while the 'V' represents the formerly named 'Versus'. Brilliant as usual!").