Takahashi also believed that the original spirit of Kamen Rider was growing weaker, so he created the Rider Core IDs to symbolize the individuality of each character, which does not exist for Riders with more than one transformant. Takahashi and Takabe both stated that reincarnation was also a secondary theme of Geats, which formulated the creation of the Desire Grand Prix. However, rather than having the Riders fight and defeat each other like a battle royale in Kamen Rider Ryuki, Takahashi wanted to tackle more of a game in the sense of Kaiji and the more recently popular Netflix series, Squid Game, where the Riders attempt to save the world instead.
However, series head writer Yuya Takahashi believed that the brand's power was also declining as well, so he capitalized on the popularity of having multiple Riders in one series while pitting them in a popular theme of today's standards, such as survival games like Fortnite and Apex Legends to appeal to a new target audience. As each succeeding series premiered, the number of Riders at debut has continuously grown but aren't necessarily stronger than the last. Kamen Rider had grown to a point where everyone in Japan at least knew what it was.
