which revolved around Xehanort, it had been decided where certain characters end up in order to potentially continue their stories in future games. The ending of Kingdom Hearts III and its downloadable content (DLC) Re Mind saw Sora end up in the city of Quadratum and the appearance of the character Yozora, who was the main character of the in-universe video game Verum Rex. Quadratum had designs elements that evoked Shibuya from Square Enix's franchise The World Ends with You as well as Final Fantasy Versus XIII, which eventually was reworked to become Final Fantasy XV, while Yozora's design was similar to Noctis Lucis Caelum, the main protagonist of Final Fantasy XV, and part of his appearance mimicked an early trailer for Versus XIII. Commentators believed series director Tetsuya Nomura, who was also the director of Versus XIII before it was reworked, was planning to implement some of his ideas from that game in a future Kingdom Hearts title. In March 2020, Nomura said Versus XIII and Verum Rex were "completely different" but an "unexpected development" between the two was occurring, and later confirmed the Shibuya in Quadratum was unrelated to that in The World Ends with You. In January 2020, Nomura said there would need to be "more time" before the next main entry in the series. Additionally, he revealed that there were two new development teams, separate from those that worked on the Re Mind DLC and the Union χ/Dark Road team, working on Kingdom Hearts content. In September 2020, Nomura stated that the development team was in the process of discussing the series' future plans between Square Enix and Disney, and that "nothing has been set in stone, but I do have some concepts percolating in my head". He added that Yozora would "definitely... be involved" in the future of the series, in an unexpected and surprising way. In April 2022, Square Enix revealed Kingdom Hearts IV was in development during the series' 20th anniversary celebration. The game is being developed by Square Enix Business Division 3, the same Osaka-based team that developed Kingdom Hearts III, with Tai Yasue serving as co-director, and Masaru Oka and Akiko Ishibashi joining Nomura to write the game. The game's reveal trailer was created with Unreal Engine 4, with the final game planned to be made with Unreal Engine 5. Wesley Leblanc of Game Informer felt Nomura was able to realize