History Trivia / KamenRiderZiO

* IKnewIt: [[spoiler:Swartz was a very popular guess as the one who becomes Another Decade. Sure enough, episode 44 shows him become Another Decade.]]

* ActorAllusion:
** Or rather, Suit-Actor Allusion, for Geiz's suit actor Yuya Nawata. In the ''OOO Arc'', Geiz gets the Genm Armor, which is based off [[Series/KamenRiderExAid Kamen Rider Genm]], Nawata's first in-suit role as a Kamen Rider.
** Creator/RikiyaKoyama as the EvilCounterpart of TheHero from another timeline? [[Film/KamenRiderXKamenRiderGaimAndWizardTheFatefulSengokuMovieBattle Sounds familiar.]]

* CashCowFranchise: The Ridewatches have a lineup that, when including giveaways, limited items, and other obscure sources, numbers at approximately ''246'' unique watches. This includes all upgraded and final forms for every phase 2 Heisei Rider (barring [[Series/KamenRiderExAid Brave Level 50]], but including [[Theatre/KamenRiderZangetsuGaimGaiden Zangetsu Kachidoki Arms]]), every final form for every primary phase 1 Heisei Rider and some forms/watches for the other Riders, and even some hypothetical or ''SIC Hero Saga''-exclusive forms like [[Series/KamenRiderDouble CycloneAccelExtreme]] and [[Series/KamenRiderRyuki Ouja Survive]]. All without ''any'' indication that they'd ever be used in the show or related material, and even ignoring that the super form Ridewatches are [[DepartmentOfRedundancyDepartment redundant]] to the Decade Ridewatch's functions. Bandai even tried to go even further by including basic alternate forms as part of the lineup, before being rejected in polls. Even after ''Zi-O'' had finished airing, they even made more with the [[Series/KamenRiderSaber Saber]] and Decade Complete Form 21 Ridewatches, and continue to release even more Ridewatches, with the Quartzer auxiliary Ridewatches seeing a release in 2022. This went even further when less than a week after ''Series/KamenRiderGeats'' finished airing, [[https://twitter.com/bandai_ridertoy/status/1697806760982237376 they announced more Ridewatches]] for [[Series/KamenRiderRevice Revi and Vice]], [[Series/KamenRiderGeats Geats]] and [[Series/KamenRiderGotchard Gotchard]], the last of which hadn't even started airing when the announcement was made.

* CashCowFranchise: The Ridewatches have a lineup that, when including giveaways, limited items, and other obscure sources, numbers at approximately ''246'' unique watches. This includes all upgraded and final forms for every phase 2 Heisei Rider (barring [[Series/KamenRiderExAid Brave Level 50]], but including [[Theatre/KamenRiderZangetsuGaimGaiden Zangetsu Kachidoki Arms]]), every final form for every primary phase 1 Heisei Rider and some forms/watches for the other Riders, and even some hypothetical or ''SIC Hero Saga''-exclusive forms like [[Series/KamenRiderDouble CycloneAccelExtreme]] and [[Series/KamenRiderRyuki Ouja Survive]]. All without ''any'' indication that they'd ever be used in the show or related material, and even ignoring that the super form Ridewatches are [[DepartmentOfRedundancyDepartment redundant]] to the Decade Ridewatch's functions. Bandai even tried to go even further by including basic alternate forms as part of the lineup, before being rejected in polls. Even after ''Zi-O'' had finished airing, they even made more with the [[Series/KamenRiderSaber Saber]] and Decade Complete Form 21 Ridewatches, and continue to release even more Ridewatches, with the Quartzer auxiliary Ridewatches seeing a release in 2022.

* TheWikiRule: Covered as part of [[http://kamenrider.wikia.com/wiki/ Kamen Rider Wiki]].

*** He has also played a character whose main method of fighting involves [[LightNovel/FateZero manipulating time]].

* CashCowFranchise: The Ridewatches have a lineup that, when including giveaways, limited items, and other obscure sources, numbers at approximately ''246'' unique watches. This includes all upgraded and final forms for every phase 2 Heisei Rider (barring [[Series/KamenRiderExAid Brave Level 50]], but including [[Theatre/KamenRiderZangetsuGaimGaiden Zangetsu Kachidoki Arms]]), every final form for every primary phase 1 Heisei Rider and some forms/watches for the other Riders, and even some hypothetical or ''SIC Hero Saga''-exclusive forms like [[Series/KamenRiderDouble CycloneAccelExtreme]] and [[Series/KamenRiderRyuki Ouja Survive]]. All without ''any'' indication that they'd ever be used in the show or related material, and even ignoring that the super form Ridewatches are [[DepartmentOfRedundancyDepartment redundant]] to the Decade Ridewatch's functions. Bandai even tried to go even further by including basic alternate forms as part of the lineup, before being rejected in polls. Even after ''Zi-O'' had finished airing, they even made more with the [[Series/KamenRiderSaber Saber]] and Decade Complete Form 21 Ridewatches, and continue to release even more Ridewatches, with the Quartzer auxiliary Ridewatches seeing a release in 2022. By the time ''Zi-O'' had finished airing, it had made ''30.2 Billion Yen,'' the most ever made for a ''Kamen Rider'' season.

** Masaki Suda was unable to reprise his role as [[Series/KamenRiderW Philip]] in ''Heisei Generations FOREVER'' because his career had massively taken off, with his schedule reportedly being booked solid for the next ''two years''. Which is a shame, because he reportedly said he would have loved to come back.

** Another Double was originally planned to have a human identity, but the idea was scrapped due to time constraints; producer Shirakura has said that he hopes they'll still get the opportunity to introduce and develop the character.

** Shirakura revealed in 2023 that Another Double's identity is an ex-fan who turned against the series after the 2011 earthquake, [[BrokenPedestal believing that the people should not celebrate heroes who aren't there for them]].[[note]]If implemented, this would've had some serious DramaticIrony, as one of the most famous pieces of property to survive the quake was in fact ''a statue of Ichigo''.[[/note]]