https://wccftech.com/dragon-quest-xii-is-powered-by-unreal-engine-5-story-is-already-complete/

As part of the celebratory livestream for the 35th anniversary of the franchise, Square Enix officially unveiled Dragon Quest XII: The Flames of Fate. The game will be powered by the brand new Unreal Engine 5, according to this official tweet, and some other information appeared on a recruitment post penned by series creator Yuji Horii and game director Takeshi Uchikawa.

Horii revealed that the command battle system will be overhauled and a prototype system that the developers believe to be fun is already in place. The story is also already done, though Horii does say Dragon Quest XII: The Flames of Fate will nonetheless take time to complete as it's going to be a big game.