Kamen Rider Zi-O: Over Quartzer

Kamen Rider Zi-O: Over Quartzer (劇場版 仮面ライダージオウ Over Quartzer（オーヴァー クォーツァー）) is the upcoming Summer film adaptation of Kamen Rider Zi-O, set to double-bill with , while serving as a tribute to Kamen Rider Drive. In the film, Sougo comes face-to-face with the Quartzers, who intend to wipe Kamen Rider Drive from history and conspire against his kingship.

Synopsis
The Quartzers, calling themselves the Wardens of Time, appear after Sougo Tokiwa collected all of the Heisei Ridewatches. A grand conspiracy behind the birth of the King of Time becomes clear...

Plot
Sougo Tokiwa, Geiz, Tsukuyomi and Woz receive a call from Krim Steinbelt. He asks them to protect his ancestor that is threatened by an unknown enemy. Because if his ancestor perished, so does he, and the history of Kamen Rider Drive will disappear as result.

Sougo and his friends go to 1575, in the Sengoku period. In there, they meet Nobunaga Oda, the revered demon king. But instead, Nobunaga is a weak-willed lecher. Nobunaga tries to court a foreign woman named Laura Steinbelt, Krim's ancestor. So, they must protect the woman.

Suddenly, enemy appears in the form of Kagen (Kamen Rider Zamonas) and Jogen (Kamen Rider Zonjis). As Sougo and his friends fight them, Go Shijima arrives from the future to assist. After successfully repelling the enemies, Go tells them the history of Kamen Rider Drive.

Later, a war breaks out. As Nobunaga is too scared to lead his army, Geiz took his place instead. Zamonas and Zonjis also appear in the midst of enemy's army, they brought out Time Mazines too. Sougo, Woz and Go fight them and win. After that, they come back to 2019, Krim and Go hand Sougo the Drive and Mach Ridewatches respectively. With that, all 20 Heisei Ridewatches are collected.

Suddenly Woz stole all the Ridewatches. When the rest confront him, he summons a platform full of people with the same outfit as him, and introduce themselves as the Quartzer. They're the controller of history, with the leader, adult Tokiwa Sougo himself. Adult Sougo transform into Kamen Rider Barlckxs and defeat Sougo in his GrandZi-O form, capturing him.

In prison, Sougo asks why Woz betrayed him. The prophet of future answers that his loyalty is always to Sougo, adult Sougo that is. An enraged Geiz attacks Woz and they fight fiercely, but it's a distraction while Tsukuyomi and Go release Sougo.

In the middle of city, adult Sougo declares his true goal: to converge the present Sougo's world with his homeworld, as the current world is corrupted beyond belief with the rise of Oma Zi-O. He opens a time-space portal to take everyone into his homeworld, and even Sougo is taken.

But Sougo arrives in a strange dimension instead. In there, he is greeted by Oma Zi-O himself. The future demon king explains that the adult Sougo of Quartzer is from different timeline, and reaffirm that yes, he is Sougo's future. Oma Zi-O can't let adult Sougo interrupting his future, so he lends his power to Sougo: the Oma Zi-O Ridewatch. With that, he sends Sougo back to his world. Sougo transforms into Zi-O Oma Form and begin the final fight against his adult self.

Zi-O Oma Form has an ability to summon all Heisei Kamen Riders in their final forms. Seeing this, Woz tore a page from his book, stating that history is not set in the stone, and comes back to Sougo's side, until Barlckxs stabs him with his sword, killing Woz. Cornered, Barlckxs absorbs Zonjis' Ridewatch to transform into a giant. Sougo with all Heisei Riders then use their Rider Kicks to finish him.

With the defeat of adult Sougo, Geiz and Tsukuyomi disappear because the future of Oma Zi-O is changing (as Sougo gains his power). But, the Quartzer come back before Sougo and return the history to its true path, restoring Geiz, Tsukuyomi, Woz and even Oma Zi-O. They come back to 95 DO happily.

Some day after that, Sougo has a dream of seeing a future Rider: a chartreuse yellow Rider with a grasshopper motif...

Continuity and Placement

 * Kamen Rider Zi-O: This movie's premiere fell between the broadcasts of episodes 44 & 45. However, since the film is completely standalone, this movie is considered to be an extra chapter to the story leaving the film taking place anywhere after the notion of the Drive Ridewatch's retrieval.
 * Kamen Rider Zero-One: to be announced

Allies

 * Tsukuyomi
 * Krim Steinbelt
 * Oda Nobunaga

Quartzer

 * Kasshin

Main Cast

 * Sougo Tokiwa (常磐ソウゴ): So Okuno (奥野 壮)
 * Geiz Myoukouin (明光院 ゲイツ): Gaku Oshida (押田 岳)
 * Tsukuyomi (ツクヨミ): Shieri Ohata (大幡 しえり)
 * Woz (ウォズ): Keisuke Watanabe (渡邊 圭祐)
 * Ziku-Driver, Ridewatch, Oma Zi-O Voices: Rikiya Koyama (小山 力也)
 * Ziku-Driver Voice: Yohei Onishi (大西 洋平)
 * BeyonDriver Voice: AFRO (アフロ)

Guest Cast

 * SOUGO Tokiwa (常磐 SOUGO (ソウゴ)): ISSA
 * Kagen (カゲン): Papaya Suzuki (パパイヤ鈴木)
 * Jogen (ジョウゲン): Syuusuke Saito (斉藤 秀翼)
 * Oda Nobunaga (織田 信長): Tomoya Maeno (前野朋哉)
 * Gyuzo (牛三): Jiei Wakabayashi (若林時英)
 * Clara Steinbelt (クララ・スタインベルト): Eru Aoba (蒼葉える)

Returning Cast

 * Go Shijima (詩島 剛): Yu Inaba (稲葉 友)
 * Krim Steinbelt (クリム・スタインベルト): Chris Peppler (クリス・ペプラー)

Ridewatches

 * Watch used:
 * Zi-O
 * Zi-O, Zi-O Ridewatch II, GrandZi-O, Oma Zi-O
 * Geiz
 * Geiz, GeizRevive
 * Barlckxs
 * Barlckxs
 * Zonjis
 * Zonjis
 * Zamonas
 * Zamonas
 * Rider Armor(s) used:
 * Zi-O
 * Zi-O II, GrandZi-O, Oma Form
 * Geiz
 * GeizRevive Shippu, GeizRevive Goretsu
 * Barlckxs
 * to be determined
 * Zonjis
 * to be determined
 * Zamonas
 * to be determined
 * Kamen Rider(s) summoned in Grand Zi-O:
 * Ryuki, Faiz, Den-O Sword Form, Kiva, Double CycloneJoker, Gaim Orange Arms, Drive Type Speed
 * Weapon(s) summoned in Grand Zi-O:
 * to be determined

Miridewatches

 * Watch used:
 * Woz
 * Woz, Ginga, Shinobi
 * Futurering(s) used:
 * Woz
 * Woz GingaWakusei, Futurering Shinobi

Signal Bikes

 * Bike Used:
 * Form Change: Signal Mach
 * Signal Exchange:
 * Form Used:
 * Mach

Progrise Keys

 * Key Used:
 * Rising Hopper, Flying Falcon
 * Form Used:
 * Rising Hopper Form, Flying Falcon Form

Theme song

 * P.A.R.T.Y. ~Universe Festival~, by DA PUMP

Errors

 * to be added