1Truth2Lies you provide so much information that you make it difficult not to believe and support your theory. I really wish you were right. I'd be beyond happy if they released something similar to XII after all these years...
I hope I'm right, also. However, since Q1 2009, I've been pondering the thought of Ito secretly directing a mainline FF. All the evidence I've amassed since then was only to make sure I was not engaging in wishful thinking. I need there to be solid proof to support my belief. Thankfully, I was able to speak to some Square Enix developers about Ito when they've toured to London to promote their games. I'm also grateful to the ones that answered my questions about him via Twitter.
This belief has cost me, though. I've garnered some internet haters and have a somewhat negative reputation for my continued threads on the whole "Ito returning to mainline FF" subject. However, no amount of hate will make me give up my belief, especially seeing as I have evidence to support it. None of this is blind wishful thinking or tin hat theorising, as my haters claim.
As for the gameplay of FFXVI, I'm sure with Ito's directing then it will be an evolution of FFXII's ADB and Gambit systems. Ito said more than once in the past that he wants to evolve the gameplay of FFXII in a future game. That game will be FFXVI.
I know having some evidence is nice, but it's better not to put all of our hopes on Ito being the chosen one for XVI.
Now, I'd absolutely love it. He's one of the most important parts of the series, and has contributed in so many things I can't even think of one reason he's been so underused for so long (unless, of course, that he's actually directing/producing XVI).
And he's directed both of my favourite FF (VI and IX) and has really collaborated in others I really love (XII, Tactics...) and basically created the classical battle system we knew from IV to IX.
I hope Verendus is right and that the title is already on its way (which would be something logical). He also said that, unless things have changed, the protagonist was to be a male, that it would be the opposite of XIII (medieval setting? very open?) and that it probably would take four years or so.
I don't know about Verendus, as I'm still not convinced he has insider sources at Square Enix. All I can go off is evidence I've amassed myself.
I've long been puzzled about why Ito has been so underused on FF since FFXII IZJS came out in 2007. However, now that I'm convinced he's been making FFXVI behind the scenes, I can understand why has not been on any other FF game. If you recall, during the entire 5 years he spent working on FFXII (December 2000 - March 2006), he did not work on any other FF game; he wasn't even credited on any other Square Enix game during that period. I think that since he started on FFXVI in Q1 2008, he has been solely dedicated to that project and not wanted to work on any other FF games concurrently.
Also, I asked Yoshinori Kitase about the status of Hiroyuki Ito in February 13th, when I attended the European launch event of LR FFXIII in London. It was a passing question I asked as he signed my copy of LR FFXIII. My question was translated by a Square Enix UK translator who sat next to him at the event.
Here was my brief Q&A:
Q: I noticed Hiroyuki Ito, who has worked on the FF series for many years, had no involvement in the FFXIII trilogy, FFXIV: A Realm Reborn, and the forthcoming FFXV. Will he ever return to the FF series, possibly even direct FFXVI?
Kitase: (Laughs) Sorry, but I can't answer that question directly. However, I can tell you that the reason Ito-san never worked on the FFXIII trilogy, FFXIV, and the forthcoming FFXV is because he has his own development team at Square Enix. I personally would have liked him to have contributed ideas to the battle system of LR FFXIII, but he was simply too busy with other projects.
The only project that I can think of that will be so important to Ito is FFXVI. Similarly to how he chose to only work on FFXII and no other FF games concurrently, he's now choosing to only work on FFXVI.