No Pov.

=======>Union Academy<=======

When Ozpin and other Union Headmasters heard that Ironwood & Satsuki's failure, now they also got their text by Winter that Ethan is headed towards their way. 

Sirzechs: *anger* DAMN IT! NOW HE'S COMING THIS WAY AND FINALLY KILLED IRONWOOD & SATSUKI FOR REASONS!

Chifuyu: He's right, I already sent Houki and others and they didn't came back and my brother didn't even go.

Nezu: This is a problem, we all have to go after him and-

All Might: But he's not the only one, he has more Kamen Riders with him. They're the strongest heroes than original riders. 

Ozpin: We could not risk any students to go after them, they're the strongest riders in this world.

Then Goodwitch burst the doors as she was panting as the headmasters got their attention.

Ozpin: Glynda, what happened?

Glynda: *frightened* They're here! All Eight Riders are here!

Ozpin/ Sirzechs/ All Might/ Nezu/ Chifuyu: *eyes widened* WHAT!

=====>At Union Academy Ground<=======

Then all Kamen Riders: Primordial, Reva & Vamp, Phantom, Ryuja, Dynomaru and Maiden finally came to Union Academy defeat them once and for all for what they did, suddenly a certain Kamen Rider came as well and it was Jiro Shiragami aka Kamen Rider Virgo Ichigou who came as well.

Virgo #1-go (Jiro): Mind if I join.

Primordial: No problem, we are just getting started. 

========>Intro<=========

https://youtu.be/vFEFnMM89k4

=======================================

All Kamen Riders are together to fight against them once and for all, when Team RWBY saw Ethan & his team saw them walking towards Union Academy to fight them. 

Yang: *excitement* OH YEAH! MY BOYFRIEND IS GONNA FIGHT THESE GUYS ALREADY! 

Ruby: *eyes widened* That's your boyfriend, he's a Kamen Rider.

Weiss: He is like a leader to them.

Blake: It is possible that *notice Jiro* Hey guys, isn't that Kenji's brother. 

RWY gulped their throats when they saw Kenji's older brother who came to Union Academy, they saw them as Ethan faced at Yang and winked at her. She gasped & fainted and Blake grabbed her while fanning her & Ruby as well, Weiss saw him in person as she was blushing.

Weiss: *blushing* Okay, he's that handsome.  

Then Riku saw Team RWBY as he nudging Ethan's arm and Ethan faces at him, Riku pointed at them to talk with them and Ethan nodded as Riku teleported to them to convince them that Union is using them as making money & fame and also convince JNPR, CFVY and NDGO to join forces with the Neo Riders. All 16 Huntsmen nodded together to join forces with them, Ozpin and the headmasters came outside and Chifuyu saw Jiro in his Kamen Rider suit glaring at them.

Ozpin: *eyes widened* It's too late.

Sirzechs: *stern* They already here.

A. Might: *anger* I will bring Young Midoriya's vengeance against that Orange Kamen Rider.

Chifuyu: *stern* We all gonna bring them down together, us Union Headmasters will face these Kamen Riders once and for all.

Azazel: It appears to be Team RWBY, JNPR, NDGO and CFVY joins their side. 

Micheal: Indeed, they betrayed us for no reason.

Ozpin: *glare* Gather the students, it's time to face them all together. Since Unity Academy decided let them have their fun, let's show those Kamen Riders & those traitors how Union Heroes are done. 

========>Outside of Union Academy Ground<==========

Kamen Rider Primordial alongside Reva & Vamp, Dynomaru, Ryuja, Maiden, Phantom, Detla J, Virgo Century, RWBY, JNPR, NDGO and CFVY are together as they're ready to battle against them. They saw Ozpin & the headmasters alongside all huntsmen, I.S. pilots, Rias' peerage, Sona's Peerage and Pro Heroes are ready to battle as well, Chifuyu saw Jiro in Virgo #1 joining as well.

Chifuyu: *shock* Darling!

Virgo 1: *glare* Not anymore, Chifuyu. You let this happen to my brother, he's in the hospital because of you. He's gonna die because you let Houki, Laura and Cecilia bait him in the woods to assassinate him. It's time to feel your pain, like your dead-beat parents. 

All True Heroes stopped in further front of the center, Ozpin walked in front of them as he spoke.

Ozpin: Mr. Fredrick, as we all know your identity. We can start all over instead of killing our best students, except you already killed both Issei & Izuku. We can renegotiate that-

But All Might interrupted as he yells in anger.

A. Might: *anger* YOU WILL PAY FOR WHAT YOU DID TO YOUNG MIDORIYA!

Primordial: *scoffs* Tch! That little bastard deserves it, he doesn't need more powers like a everything. He just need his own powers instead being a like everyone else.

A. Might: *anger* YOU MURDERER!

Then Ochako butt in as well.

Ochako: *yells* I WILL BRING IZUKU TO JUSTICE, JUST WAIT TILL I GET MY HANDS ON YOU! KAMEN RIDER PRIMORDIAL!

Then Yang stood beside him as her eyes are glowing red while glaring at her.

Yang: *glare* You will never get your filthy hands on my boyfriend!

Weiss: *glares* Yeah, nobody can stop our prince charming. 

Neo Riders stared at here and former huntsmen stared at her as well.

Neo Riders/ RBY/ JNPR/ CFVY/ NDGO: *stared*..............Eehhhh!!!!!!!!!!

Blake: *blush* Weiss! You just opened your big mouth in front of us!

Weiss: *blushing* Um....I..uh....I got nothing to say.

Reva: *shouted* CAN WE GET ON THE FUCKING BATTLE!

Ruby: Swear jar.

Reva: OH FOR FUCK SAKES!

Ruby: Swear Jar again.

He gives Ruby two liens inside her swear jar, as she smiled.

Ruby: *smiled* Thank you.

Reva: *sighed* I hate you.

Vamp: *smiled* Don't hate, appreciate. 

Primordial: Let's get this battle going.

https://youtu.be/UMTR8fpv6g0

They charging towards them, Ozpin, Headmasters and Union Fake heroes starting to charge at them as well. Primordial charging towards Ozpin as he punches his face, Reva & Vamp jumps in the air as Reva pulls out his Vistamp as he presses it.

Announcer: TITANOBOA R-R-REMIX GENOME!

Then Vamp held his legs as they both transforms into their Titanoboa form.

Then Titanoboa hisses at them as it slithers around Rias' Peerage as he squeezes them as they exploded, then it springs himself as he jumps into the air as it transforms back to normal forms as he pulls his Vistamp on his driver.

Announcer: TITANOBOA! STAMPING FINISH!

They threw their kick towards them and they kicked them all (Except Asia, Irina, Gasper & Rossweisse) as they screamed in agony and they stood in front of the screen, Vamp faces back at the screen.

Vamp: Let's have a countdown with 3.......2..........1........TITANO~BOA!!!!!!!!!

They all exploded into dust, Kamen Rider Maiden fighting against Goodwitch with her magic and she uses her wand to use telekinesis against her. 

Maiden: The finale.

But she puts another magic ring on her finger as she pulls the lever on her driver and puts her hand on her driver while the ring glows.

Announcer: Chōīne! SPRING STRIKE! Saikō!

Then a magic symbol underneath her as she's ready to use her finisher, she ran towards her as she jumped into the air and finally kicked her through and she screamed in pain as she knocked out. With Virgo Century, he slicing all fake heroes as they exploded and he sees Endeavor while he's smirking.

V. Century: *smirk* Time to put the fire out.

Endeavor: *glare* Time to put you in place, runt.

He threw fireballs at him, Virgo Century charges towards him and he summons two buzzsaws as he throws at him as it slices his arms off as Endeavor screamed in pain. Then Virgo Century jumps into the air and he kicked through him as Endeavor screamed in agony as he exploded into dust, Virgo Century dusted his shoulders off.

V. Century: Now that's Kaiju-tastic.

With Virgo Ichigou, he's fighting against his ex-fiancee, Houki, Cecilia, Charlotte, Laura and Rin. Him alongside Kamen Rider Dynomaru & Phantom are shooting at them away, Jiro threw his punch at her as she got punch in the face as she crashed into the wall.

Chifuyu: *coughed* Jiro, darling *groan* we can work this out. 

Virgo Ichigou: *glare* No, I had enough with you. We are through, our wedding is off because of you when you decide to bully my little brother ever since my elder brother: Ishiro Serizawa passed away. And now, it's time for our payback.......FOR SERIZAWA LEGACY!!

He punched her stomach as she coughed in blood, he kicked her as he did Kamen Rider Ichigou pose as he jumped into the air and he kicked her through. She screamed in agony as she exploded, Kamen Rider Dynomaru uses his Gimmick Key to use his finisher.

Announcer: DYNO-GRAND VICTORY!

He pointed his Dyno-Pistol at Laura, Charlotte and Rin as he unleashed his powerful beam at them as they screamed in agony & exploded, they turned into dust and he walked away from them. With Kamen Rider Phantom blasting Houki & Cecilia, he pulls out his Gaia Memory as he presses it to use his finisher.

Announcer: PHANTOM! MAXIMUM DRIVE!

He jumps into the air as he kicked both Houki & Cecilia and they screamed in pain as they exploded as well, RWBY, JNPR, CFVY & NDGO are facing all fake heroes. Ryuja slashing every single pro-heroes as he uses his finisher.

Announcer: DRAGON NINJUTSU FINISH!

He multiplied himself as all his clones slashing all the pro heroes as they all exploded, he faces back at Shoto as he uses his secondary finisher.

Announcer: DRAGON FINISHING STRIKE!!!!!

He was charging towards him as he slashed Shoto through as he exploded into dust, he faces back at Shoto's dust. 

Ryuja: *bow* Rest in hell, like your father. 

With Ethan, he blasted Ozpin, Sirzechs, All Might and Ironwood together. He pulls out his attack as he put inside his driver.

Announcer: ATTACK RIDE. ILLUSION!

He summons three clones as he pulls out a finishing card and puts it inside his driver again.

Announcer: FINAL ATTACK RIDE. P-P-PRIMORDIAL!

All three jumped into the air as they kicked through them, Ironwood, Sirzechs & All Might screamed in agony as they exploded into dust. Ozpin glared back at him as he was charging towards him, Primordial pulled out his attack card once more to finish Ozpin once and for all. 

Annoucner: ATTACK RIDE. SLASH!

He slashed Ozpin through him as he screamed in agony and exploded. He turned into dust so he couldn't be reincarnated, he saw everyone defeated all Union Fake Heroes. They all cheered for him as all Team Neo Riders got together, Jiro smiled in joy as he notice Will Ekta walked beside him.

Jiro: *smiles* I gotta admit, he is the key to all Union & Unity.

Will: *smiles* Indeed, he's not that bad. I know he still wants to stay here though, everyone at Unity Academy celebrated that Ethan defeated all Union Fake heroes. He sure is a quick one, who know he can be The King of all Kamen Riders & DaiKaiju Heroes. 

Jiro: *nodded* Indeed, I better check Kenji is okay. 

Will: I'll call the police to arrest all Union fakers, I should build Union Academy as Ethan's new home. 

========>Outro Music<========

https://youtu.be/0ktoTdrxMD4

He walked towards Ethan, Neo Riders and Former Huntsmen, and they faced at Will Ekta the Head of Unity Academy.

Ethan: Oh, hey Will. What are doing here?

Will: *smiles* Everyone is cheering for you that you defeated all Union Fake Heroes *faced at Former Students of Union* I see that you convince them to join forces with you. 

Ruby: *nodded* Yeah, we don't want to be famous, rich or others.

Will: Oh Ethan, I was about to ask you that me & all Unity Heroes will rebuild this Academy into your own home mansion & headquarters. 

Everyone's eyes widened as they will have their own headquarters & home, Ethan amazed that he will have his own headquarters/ home mansion with his team & friends. 

Ethan: *smiles* Yes, we do.

Will: *smiled* Well Ethan, welcome to the neighborhood of Unity & Union. Welcome Neo Riders. 

Both Neo Riders & Former Huntsmen cheered for celebration as all Unity Heroes: Team Avatar, Dexter, Mystery Inc., Team Voltron, Jimmy Neutron, W.H.O.O.P. Agents, Teen Titans and all Unity Heroes gathered all together to rebuild them a new home for Neo Riders & Former Union Students. 

======>Timeskip<=======

As All Neo Riders, Former Union Students and Unity Heroes finished rebuilding their own home.

Will smiled as he faces back at Ethan, and Ethan spoke to him.

Ethan: Hey Will, sorry about that I threaten you since while back.

Will: *chuckles* It's alright, many heroes does that every time. But, they just stick with it.

Ethan: *nodded* Yeah, all of us Neo Riders will save Union City though.

Will: *smiles* Yep, if you or your teammates need any help. Just contact us.

He gave him his number as Ethan puts inside his pocket, he shook his hand.

Ethan: *smiles* Thanks again, Will.

Will: *smiles* Anytime, Ethan. Guess I have to go back at Unity. I'll see you later. See ya.

Ethan: *smiles* Bye.

He faces back at his new home/ headquarters, and he saw his own Logo on the front gate that means home for Neo Riders. Then Ethan's phone buzzed as he saw a text that Yang invited Winter & Fuyumi to go out for shopping as they told him to meet him at the restaurant, he type his phone as he message her back as he walked towards the bullhead to go to the restaurant with Yang, Winter & Fuyumi. As for RWB, they're jealous that Yang & Winter got him first.

Ruby: *jealous* No fair that Yang ask him first.

Weiss: *jealous* Me too, I wanted to ask him out as well.

Blake: *jealous* Hmm........I always wanted to tap that ass so bad, but Yang tapped his so bad. 

Ruby/ Weiss: *jealous* Yeah.

As the view of Neo Riders' Headquarters is backing up and its view of the city and finally into space while revealing the Earth. 

As the screen shown black, Kamen Rider Primordial logo reveals in front. 

THE END!

===========>Credits<=============

https://youtu.be/hr7-GOWHfRs

=======>Volume 1 Cast<=======

ETHAN FREDRICK (KAMEN RIDER PRIMORDIAL)

YANG XIAO LONG

WINTER SCHNEE

FUYUMI TODOROKI

RUBY ROSE

WEISS SCHNEE

BLAKE BELLADONNA

JAUNE ARC 

PYRRHA NIKOS

NORA VALKYRIE

LIE REN

CFVY

NDGO

TOUMA KAZUKI & VAMP (KAMEN RIDER REVAMP)

RIKU SERIZAWA (KAMEN RIDER VIRGO CENTURY)

JIRO SHIRAGAMI (KAMEN RIDER VIRGO ICHIGOU)

HANNA-BARBERA GODZILLA

GODZUKI

RYUGA IGAWA (KAMEN RIDER DYNOMARU)

COLE SEIRYU (KAMEN RIDER RYUJA)

AKIRO NARUMI (KAMEN RIDER PHANTOM)

TOUYA SEGAWA (KAMEN RIDER DELTA J)

LINA SPRING (KAMEN RIDER MAIDEN)

VERO-ONE (APPEARANCE)

KAMEN RIDER SABER (APPEARANCE) 

KAMEN RIDER BLACK SUN (APPEARANCE)

VIRGUL THE BLACK SUN VICTORIAN DRAGON (APPEARANCE)

DARKRAIJIN (APPEARANCE)

KAMEN RIDER GHOST (APPEARANCE) 

======>ANTAGONIST<=======

OZPIN

SIRZECHS

NEZU

IRONWOOD

GLYNDA GOODWITCH

RIAS' PEERAGE

SATSUKI

CHIFUYU ORIMURA

I.S. PILOTS

ELITE FOUR (NONON FORMERLY)

CLASS 1-A

DIABLO

ATLESIAN SOLDIERS

UNION STUDENTS

=======>SPECIAL APPEARANCE<=======

WILL EKTA (WAMred's Oc)

===========>Cameo<=========

CAPTAIN MARVEL (CAROL DENVERS)

MS. MARVEL (KAMALA KHAN)

KAMEN RIDER MARVEL (AUSTIN MOORE)

WOZ

==============================================.

See ya in post credit.