Playstation Access recently posted a video regarding their interview with Tetsuya Nomura. In particular, they have eight points of interest for fans regarding the development of KH3, with some being quite insightful as to the relationship between Square and Disney, as well as hints of what to expect in KH3! You can watch their video below:

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1. How does Nomura select Disney worlds to use for Kingdom Hearts III?
The staff working on Kingdom Hearts titles find Disney properties that they think could have an interesting or cool gimmick to them. They present this to Nomura, who then selects the world(s). They do listen to fans to figure out directions of what worlds to have, but Disney does not put ideas forward for the worlds. However, Disney allows the Kingdom Hearts team to view screenings of new films before they are released or even announced. This lets the team pick out specific films they might be interested in adapting, and they can then begin discussing the inclusion with Disney liaisons.

2. Will there be any certain specific Final Fantasy characters in Kingdom Hearts III?
Nomura declined to give any specific details on characters, yet states "[he] wants them in." Lightning Returns Again?

3. Where is Kingdom Hearts III in its development?
They do not feel comfortable putting a percentage on the development, but have stated that the key gameplay mechanics, worlds, and ideas have been finalized, and mass production is underway with a large team dedicated to seeing it through.

4. What do the next-gen consoles let you do for Kingdom Hearts III?
The capabilities of the PS4 and Xbox One allow for the Kingdom Shader(s), as well as more seamless loading, better lighting effects, much larger map areas, and a huge reduction in loading screens (not officially stated, but it's been suggested that there is a possibility that the only loading screens may be those when transitioning from world to world). Further more, movements have been advanced (water will ripple, Sora's hair will move, the tip of the Keyblade will light up with the color of the spell you're casting, etc.).

5. What changes can we expect to see in combat?
Ally and Enemy AIs will be more advanced; enemies will work together, and allies will interact with you in more ways in combat. Keyblade Transformations and Attraction Flow techniques are available based on "good or favorable" timing. Nomura emphasizes giving players more choice into how they approach battles.

6. Will there be new minigames/sidequests?
Nomura states they can't state anything right now, but the development team is having lots of fun building them as we speak!

7. What will character progression and leveling be like?
Nomura stated that he and the team felt the KH/KH2 system was "perfect" due to its relative simplicity. However, there will be some new elements that can be leveled up, the most notable being the Keyblade itself.

8. What about the Final Fantasy 7 remake, and how that's going alongside Kingdom Hearts III?
Kingdom Hearts III is a lot further into development than the Final Fantasy 7 remake. Therefore, they do not get into the way of each other's development, as both have separate production teams working on them. However, some creative elements from one may influence and bleed into the other.