Following Kingdom Hearts 3 initial reveal at last year's E3, series game director Tetsuya Nomura admitted it was probably a little premature to show off a trailer. After all, at the time the game was still very early in its development cycle. Fast forward a year later, and it looks like it's still to earlly to really show anything.
"We are working diligently on [Kingdom Hearts 3], but I think releasing new information will still take some time," Hashimoto said. "We included a small part regarding the story of [Kingdom Hearts 3] in the new trailer [for] Kingdom Hearts HD 2.5 ReMIX prepared for E3 2014, so please check that out."
The new trailer can be seen above, but the part about Kingdom Hearts 3 doesn't start until around 2:35.