Not sure where else to put this, but I found this KH3D Ultimania interview.
http://www.khinsider.com/news/KH3D-Ultimania-Interviews-Translated-2602
It's from May 2012. Not sure if anyone else saw it. Some of the more interesting stuff:
People were complaining about the balance with Flowmotion (like, getting chests too easily) but Nomura wanted it that way lol. I'm not sure if he's going to balance it much in KH3.
Didn't know what the whole title meant; now I know.
Interesting that they actually made the questions a trap. I wonder if there's a secret ending in KH3, there'll be something even more elaborate?
Seems Nomura wants Pixar as much as everyone else. But it sounds like he's having trouble getting their worlds in the games? License issues? Don't know, but I really hope they make it in KH3.
I'm assuming "new KH game" means KH3, not the Remixes. If it is, they've been working on it (to some extent) since before May 2012, so a year ago or so.
Also some other stuff of note: Nomura only designed the Meow Wow Dream Eater; his team designed the rest. Also, though this is kinda obvious, the story in KH 3D was more about Riku's growth than Sora.