In his latest interview where he discussed some of the mistakes of Square Enix, President Yosuke Matsuda very briefly mentioned E3. While not making any promises, Matsuda said that both Kingdom Hearts III and Final Fantasy XV should be able to make an appearance.
In typical Square Enix fashion, Matsuda cleverly gave no details what-so-ever regarding the features or story of either games, but he did mention that "there's remarkable confidence in Final Fantasy XV and Kingdom Hearts 3" when asked about their development. He continued in the interview by saying that Square Enix may be able to share more details in the future in events such as E3.
With E3 not too far away, new details may soon arise on these two long-awaited titles. Please be excited.