The January 2014 issue of Game Informer has released, and the magazine includes a preview for Kingdom Hearts III. Most of the preview is a re-telling of what we learned from the game's appearance at D23 Expo Japan, however, Tetsuya Nomura (the director of the Kingdom Hearts series) has left some comments explaining some of these revelations in more detail!
Nomura's quotes are below (with indirect quotes [in square brackets]):
Nomura: "The process of the wielders coming together will be the main storyline, but one of the highlights of the climax is going to be who is part of the seven lights and thirteen darkness when they get to the final battle. Would it be as everyone expected, or will there be unexpected members added to the mix? That is something to look forward to."
Nomura: "All Keyblades transform, and in many different ways. Through the series, various other skilled Keyblade wielders had transformed their weapon; it may serve as a hint to see what they transformed their Keyblades into, in order to understand the different ways in which they changed their form."
Nomura: [The special Keyblade moves seen in the trailer are not tied to the Keyblade abilities, but instead to the enemy you're up against.] "When the appropriate attack becomes available, the player can activate it."
Nomura: [Kingdom Hearts III] "will be a summation of everything accumulated up to this point, in terms of both story and game mechanics. I'm sure that those who've followed the series up to now are very eager to see what's next, but I think it's also important to create wonder and awe, much like when the first game in the series came out."
Nomura: "The end also means a new beginning, and I'm certain that as this story arc ends, players will be able to look forward -- carrying this excitement -- for something new and different, never-before-seen in the series."
Thanks go to Kimberley Wallace from Game Informer for the original article, and to KH-Vids for the tip.