After 8 years, Kingdom Hearts 4 will realize "an idea that we had since Kingdom Hearts 3," Tetsuya Nomura says

After all the D23 reveals, we're finally starting to get a sense of what Kingdom Hearts 4 will look like, and series lead Tetsuya Nomura is already teasing further mysteries to be revealed. Apparently, the devs had an idea during the development of Kingdom Hearts 3 that's gone unrealized since that…