Line #20 Trivia/KamenRiderZiO


1	* ActingForTwo:
2	** Keisuke Watanabe portrays both Black and White Woz.
3	** So Okuno pulls triple duty as Prime Sougo, Sougo from 3 days in the Future ("Gaim Arc"), and Dark Sougo ("Ryuki Arc"). ''Zi-O vs. Decade'' takes it up to eleven by having him portray the prime Sougo and ''six'' alternate versions of him (Including one in ''Decade vs. Zi-O''), all with separate personalities.
4	** Takamasa Suga reprises both Shinji Kido and Dark Shinji in the "Ryuki Arc".
5	** Yuichi Nakamura reprises his roles as Kyosuke Kiriya in the "Hibiki Arc" and Yuto Sakurai in the "Den-O Arc" respectively. Lampshaded in episode 39 when Sougo mistook Yuto for Kiriya.
6	** Ayaka Konno portrays both Ora and the alternate Paradox Roidmude's disguise.
7	* ActorInspiredElement: Heure and Ora’s names were selected by their actors.
8	** Sougo being in high school was decided upon when So Okuno was cast.
9	** Daiki returning was based on a suggestion by Masahiro Inoue.
10	* ActorLeavesCharacterDies: The ultimate fate of [[spoiler:Tsukasa Kadoya]] in ''Zi-O vs. Decade'', being the last production related to the franchise that [[spoiler:Masahiro Inoue]] intends to star in.
11	* AwesomeDearBoy: The reason why Satoshi Matsuda/[[Series/KamenRiderRyuki Ren Akiyama]] is back for Rider Time Ryuki, a spin-off of ''Zi-O'' based on ''Ryuki'' is because of his wish to reprise his role after seeing multiple past actors of last Rider seasons return.
12	* CashCowFranchise:
13	** 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.
14	** This also applies to the gashapon variants of the Ridewatches (which have no lights or moving parts), with pods flying out of the machines in such vast quantities that secondhand stores have literal buckets full of dead watches at a discount. There's even a Premium Bandai box with dozens of them in a bundle, sold at a high premium despite GP trinkets being meant to be the "budget" option for collecting in each series.
15	* TheCastShowoff: So Okuno by the time of ''Zi-O vs. Decade'', due to the wildly different personalities of all seven Sougos. In no particular order, he manages to portray Sougo's original persona, a brash and party-loving JerkWithAHeartOfGold, TheSocialDarwinist, a traditional delinquent, a childish softie, and a total coward, all within the span of three normal-length episodes. Add that to him singing "Zi-O, Toki no Ouja" during the main series and the opening scenes of the aforementioned special featuring his stunt chops, and you've got a guy with talent.
16	* CastTheRunnerUp: Keisuke Watanabe originally auditioned for the title character, but was passed over in favor of the writers believing Sougo's character would work better as an OrdinaryHighSchoolStudent, which he looked too old for. He was instead cast as Woz as a result.
17	* CastingGag:
18	** While Creator/RikiyaKoyama has voiced BigBad-types before, his first scene in this show involves curbstomping waves of freedom fighters very similar to [[Series/KamenRiderBlackRX Joe the Haze.]]
19	*** He has also played a character whose main method of fighting involves [[Literature/FateZero manipulating time]].
20	** This is not first time that Hideya Tawada played a [[StealthPun shinobi]] [[Series/ShurikenSentaiNinninger in another series written by Kento Shimoyama]].
21	** Jingi Irie previously starred as the titular human-robot {{Series/Kikaider}} from the recent Kikaider Reboot movie. The episode he premeres in is even called "It's Kikai! 2121", or in Japanese: "[[ShoutOut Kikaidā]]! 2121".
22	** This is not the first time Amane Kurihara's actress, Hikari Kajiwara, guest starred as a MonsterOfTheWeek character. She was also previously [[Series/KamenRiderFourze Ritsuko Usaka/Altar Zodiarts]].
23	** Creator/TomokazuSugita has two cases: He's the voice actor of the Kivat family in ''Series/KamenRiderKiva'', as the ''Kiva'' arc is Ginga's debut episode. Additionally, his voice actor is also the titular hero of ''Series/UltramanGinga'', as well as the fact that both characters are from the future.
24	** Katsuhisa Namase (Junichiro Tokiwa) previously starred in ''Keibuho Yabe Kenzo'', a TV series that had featured several ''Kamen Rider'' alumni as guest stars and lampshaded the everloving '''hell''' out of it by having every single aspect of their characters be a reference to their ''Rider'' role. Even better, several of those guest stars went on to appear in ''Zi-O'' itself alongside Namase.
25	* DawsonCasting:
26	** The then 21 years old Gaku Oshida and 20 years old Shieri Ohata portrays 18-years-old Geiz and Tsukiyomi respectively.
27	** Played straight with 22-year-old Atomu Mizuishi, who portrayed the then 18-year-old Ryuichi Sakuma/Another Faiz/Fourze in the 2003 era, and [[UnderageCasting inverted]] when he also portrays the 26/33-year-old versions of Ryuichi in 2011 and 2018 respectively.
28	** A downplayed example with 34-year-old Kento Handa; reprising his role as [[Series/KamenRider555 Takumi Inui]], he mostly appears in ThePresentDay but, for a few seconds, he also portrays his 18-year-old self in new footage featuring Takumi's powers being erased in 2003.
29	** 17/24/28-year-old Yuko Kitajima/Another Kiva is played by 40-year-old Yumiko Shaku.
30	* DescendedCreator: Kamen Rider Barlckxs from the summer movie is played by ISSA, one of the singers of the show's opening and movie's namesake ''Over Quartzer''.
31	* DoItYourselfThemeTune:
32	** "Zi-O! King of time!" is sung by So Okuno.
33	** "Future Guardian" Geiz' {{Leitmotif}} is sung by Gaku Oshida.
34	** "Black&White" is sung by Keisuke Watanabe.
35	** "Tsuki no Michiru Toki" is sung by Shieri Ohata.
36	** "Revolutionize" is sung by Rihito Itagaki, Ayaka Konno, and Kentaro Kanesaki.
37	** The theme for Rider Time: Shinobi "IZANAGI" is sung by Hideya Tawada.
38	* FlipFlopOfGod: Masahiro Inoue said that the series finale would be the final time he played Decade, but then he proceeded to star in the Decade vs Zi-O/Zi-O vs Decade two part special, which he claims will be the last time. Though he mentioned on a live stream with Kimito Totani that the reprisals would never end. It implies that Masahiro is okay with reprising his role as Decade, but wants a fairly long break before his next appearance.
39	* MeaningfulReleaseDate: The debut of Decade Complete Form '''21''' in ''Zi-O vs. Decade'' aired on 2/'''21'''/'''21'''.
40	* MemeAcknowledgement:
41	** As multiple fans began pointing out the similarities of both Geiz and [[Series/KamenRiderRyuki Ren Akiyama]], the series took note of this, with the latter's actor releasing a preview of [[https://twitter.com/Matsuda_satoshi/status/1107157656395890688?s=19 himself in Geiz's costume]], which was done for a scene in episode 3 of Rider Time Ryuki where Shinji mistakes Geiz for [[spoiler: the just-deceased]] Ren.
42	** The memes of Yuko Kitajima/Another Kiva using manhole covers as her weapon has become this as in 2020, her actress Yumiko Shaku was chosen to promote a line of {{Franchise/Pokemon}}-themed manhole covers to be installed in the Tottori prefecture in Japan.
43	* MilestoneCelebration:
44	** Much like ''Series/KamenRiderDecade'', this seems to be the one for the Phase 2 Heisei Kamen Rider series, as well as the Heisei era overall, being the 10th and 20th respectively[[note]]Interestingly, whatever succeeds this will also play this trope straight, since ''Zi-O'' is the 29th series[[/note]].
45	** In terms of individual tributes, episode 21, the first episode of the ''Ryuki'' tribute shares the airdate (February 3) of the first episode of ''Ryuki'' itself.
46	* PropRecycling:
47	** Episode 11.5 reveals that the interior of Kujigojido has been decorated with assorted stuff from past seasons, like the wall clocks from ''Series/KamenRiderBuild'' and ''Series/KamenRiderW''.
48	** The Decade Armor allows Zi-O to access previous Riders' MidSeasonUpgrade forms like [[Series/KamenRiderBuild RabbitTank Sparkling]] or [[Series/KamenRiderGhost Grateful Damashii]]. These forms use the original Rider costume's bodysuit, with the Ziku Driver and Decade Armor's helmet and chestplate on top of them.
49	** The giant ornamental clock behind Black Woz during his narrating at the start and end of each episode is a repainted version of Kamen Rider Cronus's own giant ornamental clock from ''Series/KamenRiderExAid''.
50	*** It later on becomes the giant clock in Zi-O Trinity's "cockpit" that indicates who is in control of the main body.
51	** The Future Riders recycle and kitbash costumes from several past seasons. Most prominently, all of them use copies of the Ziku Driver painted silver and modified called the Mirai Driver to use different items as centerpieces instead of Ridewatches.
52	*** Kamen Rider Shinobi's costume is made with parts from [[Series/KamenRiderGhost Kamen Rider Dark Necrom]] [[Series/KamenRiderExAid with the shoulder armor and retooled Ride-Player helmet.]]
53	*** The mooks he fights against are the Dustards from ''Series/KamenRiderFourze''.
54	*** In ''Rider Time Shinobi'', he gets a secondary rider, Kamen Rider Hattari, who’s helmet and suit is retooled from [[Series/KamenRiderDrive Kamen Rider Dark Drive.]]
55	*** Also Yami Shinobi, The BigBad of ''Rider Time Shinobi'' has his suit recycled from Another Shinobi, an enforced version of this trope.
56	*** Kamen Rider Quiz's costume is a retooled Ghost helmet on a similarly retooled standard Ex-Aid rider body.
57	*** Kamen Rider Kikai's costume is a remodeled version of the [[Series/KamenRiderBuild Guardians]] helmet and armor suit. Unlike the previous two who uses parts of past riders his suit is a retooled {{Mooks}} suit. [[spoiler: Fittingly, he's actually part of the Humanoise's ground forces who had a HeelFaceTurn, meaning he's actually an EliteMook.]]
58	*** Kamen Rider Ginga’s helmet is retooled from [[Series/KamenRiderWizard Kamen Rider Mage's]] helmet and his costume is a modified version of Kamen Rider Fourze Meteor Fusion States with Meteor's regular legs and feet.
59	** Another AgitΩ costume uses the original Another Agito suit, and appears almost identical to it, there are a few minor differences such as the chest plate is labeled with the original Rider's name and the Another Rider's date of creation like other Another Riders, the Ank Point's color is changed to solid yellow with red accents, and the suit uses a new head with longer crests and a more distinct mouth with teeth.
60	** [[BatOutOfHell Another Kiva's]] head is a redesign of the [[Series/KamenRiderDouble Bat Dopant's head.]]
61	** Kamen Rider Zamonas uses the suit of Amazon Omega, the boots of Amazon Alpha, and the color scheme of Amazon Neo. His chest is colored silver, reminiscent of Amazon Sigma.
62	** Another Diend's costume is used by using both [[Series/SamuraiSentaiShinkenger Chinomanako Diend Form]] head, chest and shoulders, and Another Decade’s legs, arms and suit.
63	** Geiz Majesty's shoulder pads are retooled and repainted from Kamen Rider Zamonas, his helmet is repainted from from his normal helmet, and his chest armor is retooled and repainted from his [=WizardArmor=], adorned with [=RideWatches=].
64	** Most of the Another Riders used the same leg and lower arm designs.
65	*** Another Wizard
66	*** Another Gaim
67	*** Another Quiz
68	*** Another Ryuga/Ryuki, because it’s the same suit.
69	*** Another Blade only had the legs
70	*** Another Kiva
71	*** Another Kabuto
72	* RecycledScript: Quite a few beats in the final arc feel like they were copied from ''Series/KamenRiderBuild'''s finale, right down to [[spoiler:the hero shouting the villain's name after he kills one of the Riders. Besides that we've got an OmnicidalManiac trying to destroy everything, the Riders dying one-by-one in the FinalBattle (with one of them getting a broken faceplate) and a ResetButtonEnding that restores everyone to life. Hilariously, Evolto was present in both final battles]].
73	* RoleReprise: Part of Sougo's quest involves meeting the past Riders; unlike ''Decade'', he'll meet at least part of the original casts. In order of release, he meets:
74	** ''Series/KamenRiderBuild'': Sento Kiryu/Kamen Rider Build, Ryuga Banjo/Kamen Rider Cross-Z, Kazumi Sawatari/Kamen Rider Grease, Gentoku Himuro/Kamen Rider Rogue and Misora Isurugi.
75	** ''Series/KamenRiderExAid'': Emu Hojo/Kamen Rider Ex-Aid, Hiiro Kagami/Kamen Rider Brave, and Kuroto Dan/Kamen Rider Genm.
76	** ''Series/KamenRiderFourze'': Chuta Ohsugi, [[Film/KamenRiderXKamenRiderWizardAndFourzeMovieWarUltimatum Daita "Kong" Kondo and Chikao "Nezumi" Nezu]].[[note]]Sota Fukushi and Ryo Yoshizawa were too busy filming ''Film/{{Bleach}}'' to appear as Gentarō and Ryūsei, but Fukushi was able to record voice-overs that Toei used along with their FakeShemp[[/note]]
77	** ''Series/KamenRider555'': Takumi Inui/Kamen Rider Faiz and Masato Kusaka/Kamen Rider Kaixa.
78	** ''Series/KamenRiderWizard'': Kosuke Nitoh/Kamen Rider Beast.
79	** ''Series/KamenRiderOOO'': Eiji Hino/Kamen Rider OOO, Hina Izumi, Michal Minato/Kamen Rider Aqua, and Akira Date/Kamen Rider Birth.
80	** ''Series/KamenRiderGaim'': Kouta Kazuraba/Armored Rider Gaim and Kaito Kumon/Armored Rider Baron.
81	** ''Series/KamenRiderGhost'': Takeru Tenkujii/Kamen Rider Ghost, Makoto Fukami/Kamen Rider Specter, Shibuya, and Narita.
82	** ''Series/KamenRiderDecade'': Tsukasa Kadoya/Kamen Rider Decade, Daiki Kaito/Kamen Rider Diend, Yusuke Onodera/A.R. Kamen Rider Kuuga and Narutaki.
83	** ''Series/KamenRiderDouble'': The Master of Fumen[[note]]He appeared in ''Heisei Generations FOREVER'' rather than the show proper[[/note]], Katsumi Daido/Kamen Rider Eternal and Ryu Terui/Kamen Rider Accel.
84	** ''Series/KamenRiderDenO'': Ryotaro Nogami/Kamen Rider Den-O, Owner[[note]]They appear in ''Heisei Generations FOREVER'' rather than the show proper.[[/note]], the Taros[[note]]Who appear in a few later episodes without Ryotaro with them[[/note]], Yuto Sakurai and Deneb/Kamen Rider Zeronos.
85	** ''Series/KamenRiderRyuki'': Shinji Kido/Kamen Rider Ryuki[[note]]Takamasa Suga voices the character via TheFaceless in ''Heisei Generations FOREVER'' before appearing in the show.[[/note]], Dark Shinji/Kamen Rider Ryuga, Daisuke Okubo, Ren Akiyama/Kamen Rider Knight, Goro Yura/Kamen Rider Zolda, Miyuki Tezuka/Kamen Rider Raia, Jun Shibaura/Kamen Rider Gai, Takeshi Asakura/Kamen Rider Ouja and Kamen Rider Odin[[note]]The latter six appeared in ''Rider Time: Kamen Rider Ryuki'' rather than the show proper[[/note]].
86	** ''Series/KamenRiderAgito'': Shouichi Tsugami/Kamen Rider Agito[[note]]Toshiki Kashu voices the character via TheFaceless in ''Heisei Generations FOREVER'' before appearing in the show.[[/note]], Takahiro Omuro/Kamen Rider G3 Mild and Mana Kazaya.
87	** ''Series/KamenRiderBlade'': Kazuma Kenzaki/Kamen Rider Blade, Hajime Aikawa/Kamen Rider Chalice and Amane Kurihara.
88	** ''Series/KamenRiderHibiki'': Tomizo Todayama/Kamen Rider Todoroki and Kyosuke Kiriya/"Transformed Kyosuke"/Kamen Rider Kyoki.
89	** ''Series/KamenRiderKiva'': Jiro/Garulu/Kamen Rider Ixa (Proto Ixa - First User).
90	** ''Series/KamenRiderKabuto'': Arata Kagami/Kamen Rider Gatack, Sou Yaguruma/Kamen Rider [=KickHopper=] and Shun Kageyama/Kamen Rider [=PunchHopper=].
91	** ''Series/KamenRiderDrive'': Go Shijima/Kamen Rider Mach, Krim Steinbelt/Mr. Belt[[note]]They appeared in ''Over Quartzer'' rather than the show proper[[/note]], and Chase/Kamen Rider Proto-Drive/Mashin Chaser/Kamen Rider Chaser.
92	** ''Film/KamenRiderTheFirst/[[Film/KamenRiderTheNext The Next]]'': Hayato Ichimonji/Kamen Rider 2[[note]]Hassei Takano voices the character via TheFaceless in ''Final Stage'' after appearing in ''Rider Time: Ryuki'' as Miyuki Tezuka/Kamen Rider Raia.[[/note]]
93	** ''Series/KamenRiderAmazons'': Jin Takayama/Kamen Rider Amazon Alpha[[note]]Masashi Taniguchi voices the character via TheFaceless in ''Final Stage''.[[/note]]
94	* RealLifeWritesThePlot:
95	** In general, this happens whenever one of the actors can't reprise their role due to scheduling conflicts. Usually, this happens because many of them has reached stardom, which ironically, is often due to their breakthrough role in Kamen Rider.
96	** Episode 6.5 openly admits that the Fourze arc was hamstrung because both Souta Fukushi and Ryo Yoshizawa (Gentaro/Fourze and Ryusei/Meteor) couldn't reprise their roles because they were busy filming the live-action ''Film/{{Bleach}}'' movie[[note]]Though Fukushi was able to record voice-overs that were dubbed onto the FakeShemp Gentaro who appears during the arc[[/note]]. In order to patch the holes left by their absence, the arc was tied in with ''Faiz'', aided by the fact that it's ''Faiz''[='s=] 15th anniversary and both Kento Handa and Kohei Murakami (Takumi/Faiz and Kusaka/Kaixa) were available to return. There are still a few hints of the arc's [[WhatCouldHaveBeen original intentions]], primarily that Another Fourze/Faiz is a ShadowArchetype for Ryusei. The writing staff was able to spin this to tie the plot in with Faiz by revealing that both Another Fourze/Faiz and the girl he's trying to save were members of the Ryusei School, turning the hints towards Meteor into a RedHerring.
97	*** This ended up wedging Fourze’s heavy theme of friendship into 555's tribute plot, resulting in rather [[NotHimself significant]] [[{{Retcon}} changes]] to 555's characters from the events of 555 being erased from history. The biggest offender of this being Kusaka, originally a [[ManipulativeBastard manipulative]] [[ItsAllAboutMe self-centered]] HateSink [[JerkWithAHeartOfJerk jerkass with no redeeming qualities]], he is now a rather selfless WellIntentionedExtremist who [[ThisIsSomethingHesGotToDoHimself takes it upon himself]] to save his friends even if it means risking his own life. Keep in mind this isn't [[Film/HeiseiRiderVsShowaRiderKamenRiderWarsFeaturingSuperSentai the first time]] things from 555's was retconned with Shinichiro Shirakura as producer to give Kusaka more sympathy. Of course, [[InSpiteOfANail it apparently doesn't really try to change how much of an arrogant jerk he is anyway]], with Takumi considering him [[TheFriendNobodyLikes someone he doesn't even like that much, but still happens to be his friend]].
98	** Episode 9.5 lampshades that Kuroto Dan's appearance in the OOO tribute arc was due to Tetsuya Iwanaga's busy schedule only allowing him to return during the time they were filming the OOO arc, with the story written around this to involve him in the plot as Another OOO, as well as having the release of a Genm Ridewatch product campaign scheduled together with the release of ''OOO''-related ''Zi-O'' products in November 2018 to accommodate this.
99	** Episode 13.5 reveals the Ghost tribute arc was delayed due to Shun Nishime being busy with filming and stage play commitments, hence Zi-O's use of the Ghost Armor being rather late despite Geiz having the Ridewatch to begin with. When asked about the possibility of Ryoma Takeuchi returning for Drive however, Nishime/Takeru advised everyone not to talk about it.
100	** Miho Kirishima/Kamen Rider Femme’s absence in ''Rider Time: Ryuki'' owes to her actress, Natsuki Katou, giving birth to her second child at the time it was being filmed. This is the reason Abyss (originally from ''Decade'') is one of the 13 Riders in the new Rider War instead of Femme.
101	** The ''Hibiki'' arc using Kyosuke instead of Hibiki or Asumu is likely due to this, with Hibiki's actor having been fired and blacklisted due to power-harassment allegations[[note]]although reportedly, he swore he'd never return, so even if he wasn’t blacklisted, he likely wouldn't have reprised his role anyways[[/note]], and the latter due to his actor retiring in 2018. Jouji Shibue wasn't able to reprise his role as Iori Izumi/Kamen Rider Ibuki either due to being busy filming on ''Series/KishiryuSentaiRyusoulger''. Kenji Matsuda didn't reprise his role as Kamen Rider Zanki, likely because Hibiki's history was not erased since Another Hibiki was created in 2019. As a result, Zanki [[spoiler: remains dead]].
102	** Decade’s increased appearances from the ''Kabuto'' arc onwards were due to Masahhiro Inoue’s schedule being busy prior to this.
103	** Most ironically, however, is that ''Zi-O'' did not have the major RealLifeWritesThePlot event that allowed ''Series/KaizokuSentaiGokaiger'' to enjoy a massive boom of eager returning veteran actors, namely the 2011 Tohoku earthquake and tsunami[[labelnote:Explanation]]Originally, ''Gokaiger'' was just going to have tribute episodes related to its MechaExpansionPack, meaning only less than a third of all then-34 previous teams would have been given proper attention. However, days after the quake and tsunami hit on March 11, a Twitter feed was setup by Teruaki Ogawa ([[Series/NinjaSentaiKakuranger [=NinjaRed=]]] and [[Series/SeijuuSentaiGingaman BlackKnight Hyuuga]]) to allow other veteran actors not just from ''Super Sentai'' but from across all tokusatsu to spread encouraging messages to the people. Through this, many Sentai veterans discovered about Gokaiger and wanted in, even those who had retired like Ogawa's co-star, Kazuki Maehara ([=GingaRed=]). This explains the clearly-shoehorned-in cameos in the ''Gokaiger Goseiger 199'' crossover movie that would be released soon after. That Naruhisa Arawaka was able to seamlessly integrate new tribute episodes is likewise a testament to his skill as a writer[[/labelnote]].
104	* TroubledProduction: Scheduling and plotting the scripts around the returning alumni made production much harder than most Rider shows. Ironically, the incident that caused its spiritual predecessor ''Gokaiger'' to suffer its own case of TroubledProduction prevented this problem, since the show was not meant to have a lot of veterans return, but through their discovery of the show, many eagerly went above and beyond to take part, even just as a cameo, making the scheduling and writing process much easier for that show.
105	* WhatCouldHaveBeen:
106	** 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'', leading to his planned role in the film to be replaced by Woz. Which is a shame, because he reportedly said he would have loved to come back.
107	** Oddly enough, neither was Renn Kiriyama able to reprise his role as Shotaro Hidari for undisclosed reasons, despite having reprised his role for multiple movies before and sharing the same sentiments with Suda.
108	** Hiro Mizushima (Souji Tendou) posted on Instagram to say that he hadn’t been contacted about returning, but added that he does '''not''' view his time on ''Series/KamenRiderKabuto'' as OldShame, considering it the starting point of his career, expressing fondness for his cast- and crewmates, and hoping for success for ''Heisei Generations FOREVER''.
109	** Another Double was originally planned to have a human identity, but the idea was scrapped due to time constraints; Shirakura revealed in 2023 that he was going to be 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]]
110	** Natsuki Katou said that she would have gladly reprised her role as Miho Kirishima in ''Rider Time: Ryuki'', but was pregnant with her second child (who was born around the time the mini-series was filmed) and thus was physically unable to return. Interestingly, this seemingly led Toei to opt to not use Femme at all (as opposed to use the rider but have someone else take on the identity, like they did with Scissors, Tiger, Imperer, and Verde), and instead use Abyss.
111	** Although he did end up reprising the role in ''Rider Time Ryuki'', Satoshi Matsuda expressed an interest in reprising his role of Ren Akiyama for the main show prior to the ''Ryuki'' arc filming. It’s possible that had Toei not been able to get Takamasa Suga or Kanji Tsuda back to reprise their roles as Shinji and Daisuke, Ren would’ve appeared in the TV series as well.
112	** Producer Shirakura said around the beginning that he was going to contact Jo Odagiri to see if he could reprise his role. One must wonder that if he did return, if it was going to be for a tribute arc since Kuuga was the only Rider who did not get a tribute of any kind on the show (''Den-O'' had its own arc and ''W'' and ''Drive'' combined their tribute with the Movie Riders arc and the final arc respectively).
113	** Around the time of the ''OOO'' arc, images were released showing Zi-O [[Series/KamenRiderDrive MachArmor]]. However, Sougo didn't obtain the Mach Ridewatch until near the end of the series in ''Over Quartzer'', by which point the use of individual Ridewatches had completely dropped off, meaning it never appeared outside those original pictures.
114	** A toy catalog list reveals Tsukuyomi was supposed to become a Rider far earlier in the show’s run and even get a Rider Armor. The Rider Armor never appeared and she only got to be a Rider in the last two episodes.
115	** After the series' run, storyboarder Seima Muto revealed [[https://m.facebook.com/story.php?story_fbid=2351313821649282&id=111778982269455 three unused sketches]] of Another Riders for Cross-Z, Chalice, and Mach, which also implies possible scrapped plans for more secondary Riders to have their own Another Riders as well.
116	** The Time Jackers were intended to have their own monster forms, but Shirakura vetoed this, saying that main villains being {{Recurring Boss}}es was something that ''Franchise/SuperSentai'' already did better. Similarly, Tsukuyomi was meant to receive a monster form, but Shirakura instead suggested she become a Rider. In an ironic twist, every Time Jacker ended up becoming monsters in the form of Another Riders.
117	** In a similar case to Ankh from ''OOO'', Woz was originally intended to become the BigBad at the end, but his chemistry with the rest of the heroic cast and popularity with the audience led to him remaining a TokenEvilTeammate throughout the series, never making a full FaceHeelTurn. The idea however would be repurposed somewhat in material outside the main series, with [[spoiler:the V-Cinema promoting White Woz to the position of BigBad.]]
118	** Originally Kamen Rider Zamonas or possibly Barlckxs was also supposed to incorporate designs of the Reboot Riders of ''Film/KamenRiderTheFirst'' and ''Film/KamenRiderTheNext'' instead of just ''Series/KamenRiderAmazons'', but was scrapped once the suit designer found it impossible to do.
119	** Swartz and Tsukuyomi were originally conceived to be Ohma Zi-O's children during early concept planning, but that was scrapped once the FridgeLogic of it kicked in.
120	** Kimito Totani reprised his role as Daiki Kaito in the series, and was also planning to return for ''Decade vs Zi-O'', but had to turn it down to take care of one of his sick parents.
121	** According to Masahiro Inoue, he wanted Decade to fight as Complete 21 without [[spoiler:having its full power being kneecapped by both a stab wound and Another Decade (meaning it's operating at ''less than half power'' during its debut)]], but was presumably shot down by Toshiki Inoue.

Context Trivia / KamenRiderZiO