I think it's Sora personally... even though it's probably not.
-3rd party hero with a very close affiliation to the playstation brand: Sora started out on the Playstation 2 but later moved to Disney handheld consoles, but people (including myself) still regard him as a PS character.
-A character whose development origin comes from a Japanese studio: Square Enix is a Japanese company.
Just my thoughts... not gonna get my hopes up though.
However, I don't think the new leaks do answer every single hint. From what PG said, that leak is pretty much nothing compared to the rest of what we don't know. There are probably more than 14 stages, since he said he knew "almost 12" (10-11) and now he knows "several more" (several is more than a few, which means more than two but not many more (so between 3-7 more stages)).
Also, I must say I absolutely love the move that SuperBot made in regards to the leak. Answer the leak with the epitome of leakers, and take the hype from 0 to max yet again, all without saying an official word of PR.
This one is Snake. I believe Jack Tretton used similar phrasing at e3
Also it is bothering me that people keep listing leaked characters as the one he is referencing
He knows the leaked characters and does not give hints about them.
If he knows the leaked characters, that means he still knows six more. Which would mean 26 characters. However, those hints he gave for characters were made prior to the leaks, and he just pasted them there again, so they could still refer to the leaks.
I take it that they still refer to the leaks. I think he's probably just adding on. Not to mention that he even got his previous leaks to have Jak and Daxter hints with Cole, even though he already confirmed them.
By the way, just call me Count for short.