https://wccftech.com/kingdom-hearts-4-quadratum-ue5/

During a 20th anniversary event for the series in Japan, Square Enix officially revealed the next installment in the Kingdom Hearts series, Kingdom Hearts 4.

The 4th installment in the beloved franchise was announced via a debut trailer at the ending of the anniversary event. The trailer shows a mature Sora, as well as Donald and Goofy, thereby seemingly departing from the cartoonish 'cute' style of the previous games in the series. The trailer for Kingdom Hearts 4 opens with the following line: "f this isn’t the ending you desired- if it brings you despair- then leave this world for another”.