Tonight at the Kingdom Hearts Orchestra - World Tour - in LA, the Kingdom Hearts series' director Tetsuya Nomura has made another appearance. As translated by the official concert interpreter, Nomura tells fans that he will return in a month for D23 Expo 2017 on July 15, 2017, with "final information" on Kingdom Hearts III. We do not yet know the content of this final information, but we do know that at D23 Expo 2017 we will see a new world reveal as well as a new trailer, as was announced in the most recent Kingdom Hearts III trailer from yesterday's LA concert.
UPDATE 1: At yesterdays Kingdom Hearts Orchestra - World Tour - in LA, Kingdom Hearts director Tetsuya Nomura made his third appearance. According to @SkywardWing on Twitter, who was at the concert, Nomura tells fans that, as translated by the official concert interpreter, "If this month's announcements made you happy, next month's will make you even happier." He is referring to the upcoming news and trailer at next month's D23 Expo 2017 on July 15th.
UPDATE 2: During the final Kingdom Hearts Orchestra - World Tour - in Osaka, Japan, Kingdom Hearts series director Tetsuya Nomura stated that they raised expectations high for the new Kingdom Hearts III information and news being revealed at D23 2017. He makes sure to note that it will be "normal" Kingdom Hearts III news, and he would like people to spread this word.