Director Tetsuya Nomura spoke to IGN about the delay for Kingdom Hearts 3 and why Big Hero 6 has yet appear in a Kingdom Hearts 3 trailer.
Originally, Kingdom Hearts 3 was aiming for a 2018 release window. However, Square Enix surprised fans, who were expecting a 2018 date, during the Kingdom Hearts Orchestra: World concert on June 9 in Los Angeles. Nomura said the reason was not developmental-wise but was for the fans in the West.
Nomura has considered releasing the game early but the dev team basically rejected the idea. Rather than rushing the development, the team prefer delaying the game. This given the dev team more time to refine the game.
Two new worlds (Arandelle and The Caribbean) revealed throughout the weekend before E3, but Big Hero 6 has yet to make an appearance despite its announcement in 2015
Nomura explained that the Big Hero 6 world is almost complete, however the cutscenes are not finish.
“…We pretty much have finished creating all the gameplay within that world, but we’re just not finished with the cutscenes yet,” Nomura said.
Twilight Town, Olympus Coliseum from Hercules, Monstropolis from Monster Inc., Toy Story, Corona from Tangled, The Caribbean from the Pirates of the Caribbean, Arandelle from Frozen, and San Fransokyo from Big Hero 6 are worlds confirmed for Kingdom Hearts 3 (so far).