Spoilers from included and/or represented works abound. Please read this fiction carefully.
Aegis quickly approached and hugged Makoto Yuuki.
"You're back!" Aegis cried.
"Oh, Aegis... I missed you, yet wanted you all to move on..." Makoto responded.
"Don't worry, we have you covered." Kotone reassured. "I even have the same destiny, after all."
S.E.E.S. members rejoiced, while Prometheus emerged from the rubbles below, confused at the heartwarming reunion this is.
"Bruh... I didn't expect you to have such reunion as I summoned those lowlifes..." Prometheus is confused. "Angela of Lobotomy Corporation, apprehend them."
"I'm glad you're doing well." Makoto candidly replied."
"Good to see you back in action." The Investigation Team and the Phantom Thieves approached. "Remember us from Rei and Zen's adventure?" "And remember us in Hikari's cinema?"
"Nice!" Junpei Iori replied.
"Hey, you Persona men!" Angela annoyed the three Persona parties.
"Hey, we're having a reunion there!" Akihiko argued with Angela.
"Didn't expect you to have something that made this reunion so damn annoying." Angela looked down at the parties.
The rest of the Alliance boos Angela.
"Not cool, Miss Angela!" Rex argued with Angela. "S.E.E.S. has gone through a lot to save their world back in late 2000s!"
"Having come to know about my friends and companions across my adventure, I am not amused." Makoto Yuuki argued. "Show some respect, lady."
"Empress Zero knows what you're up to, so I can care less." Angela explained.
"Nyx Extermination to save our world, and you have no right to make fun of it!" Kotone argued.
"You're running our reunion." Yu told Angela. "We have no choice but to shut you up."
"I'll gladly take you." Angela opened her book.
"How about me?" Kamen Rider Ginga asked.
"Shut the fuck up, galaxy bitch." Angela looked down at Kamen Rider Ginga.
Makoto Yuuki pointed his Evoker at Angela. "So be it."
The fight continued, now with Angela going against S.E.E.S., the Investigation Team and the Phantom Thieves of Hearts as well.
"Shut up, I hate you, you stupid jerk!" The voice of Kusumi-no-Okami rang through Angela. The latter ultimately gets overwhelmed by the three Persona parties.
Meanwhile, the rest of the alliance threw against Prometheus with what they have. To control the any further damage on the scene, Luffy turned the surfaces into rubber, but Prometheus quickly turned it back to normal.
"Reality Stone makes wonder." Prometheus caught Luffy again.
Ichigo stabbed the Daikaiser from behind. Luffy stretched his hands to turn the surfaces into rubber again.
"No more, you fuck-bot!" Deadpool shouted.
"Rasen... Chidori... again!" Naruto and Sasuke charged ahead again, with the same combination. "Wind and Lightning Release: Typhoon Lightning Spiral!"/"Fūton Raiton: Gufū Raisengan!"
Note: Naruto forms a wind-natured Rasengan and Sasuke adds his Chidori to the sphere, after which the two thrust the technique into the opponent. (First shown in Naruto Shippuden: Ultimate Ninja Storm Generation)
Prometheus got hit with that again, but once again, isn't visibly damaged. The Daikaiser pushed both out.
"That trick doesn't work." Prometheus commented, not realizing that...
"Six Paths: Shinra Tenkyō!" Both young Naruto and young Sasukeuse thechakraof the ninetailed beaststo enhance their power; with the former manifesting his three-headed, six-armed Tailed Beast Mode while forming theSix Paths: Ultra-Big Ball Rasenshuriken, and the latter manifesting his enhanced Complete Body — Susanoo while formingIndra's Arrow.
They fire off their techniques simultaneously at the Daikaiser, resulting in a cataclysmic explosion that would've destroyed the Crossing Wasteland if it's not for Luffy's Gear 5. The alliance is protected by the protection spell, while Angela blocked all off. Kamen Rider Ginga is burned.
"That burns!" Kamen Rider Ginga after the explosion.
Everything rubberized by Luffy all went back to its previous state. At that point...
"Finally, Portalstone bless me again!" Meden just fused with the Portalstone.
"Huh... And you have Portalstone?" Prometheus recovered from the blast.
"You're still alive?" Meden asked Prometheus.
"Not a big deal." Prometheus responded.
"Bruh... He actually resisted our combined technique..." Young Sasuke facepalmed.
"Can't believe it..." Young Naruto facepalmed.
Then, Meden and Prometheus headbutted each other.
"Now, how come you have become so powerful?" Meden asked Prometheus.
"I was revived by the God-Scientist, and have given a chance for revenge against those Jump shits!" Prometheus explained. "I fused with the Evil Omni-King named Archon and wore the rejuvenated armor made of Ultron-Sigma, Infinity and the Crown!"
"Nekron then sacrificed himself to power the armor alongside the Sigma Virus and the three full sets of Infinity Stones!" Prometheus continued. "This is the chance to get revenge on the very persons that busted me!"
"You mean those guys from Shonen Jump!?" Meden asked again.
"Yes. I could've been the divine ruler of both the real world and the entirety of Jump complex multiverse!" Prometheus confirmed. "But one warrior defeated me, and stole Umbra..."
"Good thing they know how heinous and treacherous you are to them." Meden responded. "I used to take the Portalstone, but I have since tolerated Tenzai and Kouryuji, and their friends. I have been chilling ever since."
"Until some things went out to distract us, with the Oros Phlox in the line!" Meden continued.
"You could've had the Portalstone for yourself." Prometheus made fun of Meden.
"How dare you piss off my darling!" Due argued with Prometheus.
"Hey, you! Calm down!" Mii told Due.
"Duh." Due isn't amused.
"I will extinguish all Jump as well as their allying associates." Prometheus threatened the alliance. "Including you and Oros Phlox."
Meanwhile...
"If your don't come to your senses, I will beat you up." Akihiko threatened Angela with his electrified first.
Angela blinked her eyes, from yellow to red there, turning her into Carmen.
"I beg you..." Carmen begged the Persona users. "Please... stop..."
"Huh?" Akihiko is confused.
"She turned into a different person?" Yu wondered what happened.
"Just before, her eyes is yellow." Ren Amamiya observed. "Now it's red."
"I'm Carmen. Please don't hurt me." Carmen begged the Persona users.
"Only if you stop trusting in Empress Zero." Akihiko responded. "After all, she's a reversed crap."
"Get the shit and stop trusting this monster, miss!" Ryuji warned Carmen.
Carmen cried.
"She seems like a poor woman." Fuuka Yamagishi, with her Persona, Juno, commented. "However..."
"Empress Zero is a monster." Kanji warned Carmen. "She broke the omniverse and she must pay for that. Overly. Dearly."
"All realities is suffering because of her and her servants!" Futaba warned Carmen. "Be sensible. Don't ever trust her again."
"She's even more sinful than I previously realized." Satanael commented about Empress Zero.
"Someone needs to burn her EXS down." Hyde commented. "As for this Library girl..."
Carmen blinked to heterochromia, took the book, then went silent.
"She doesn't respond anymore." Haru Okumura realized.
"Uh, she must have been forced to realize that she has been crossing the line since she trusted that Zero girl." Zenkichi commented. "That silent woman needs a therapy."
"Angela of Lobotomy Corporation is suffering from some sort of PTSD." Satanael replied. "Someone call a therapist."
"Ugh... Damn!" Kamen Rider Ginga recovered.
"Hey, Ginga." Mercurius called Ginga. "Can you help us with that monster in robot armor?" *referring to Prometheus*
Meanwhile, Meden and Prometheus is trading blows with each other. However, from the portal has emerged several Jump warriors: Goku's and Vegeta's friends and families, Frieza, Beerus, Whis, the crews of Straw Hats Pirate, Blackbeard, Sakura Haruno, Kakashi Hatake, Obito Uchiha, the rest of Jinchurikis, all generations of the five Kages, the members of Akatsuki, Rukia Kuchiki, the rest of the Soul Society, Gon Freecss, Killua Zoldyck, Izuku "Deku" Midoriya, Light Yagami, Jonathan Joestar, Jotaro Kujo, Giorno Giovanna, Yusuke Urameshi, Yugi Muto, Seto Kaiba, the Dragon Boys, the Bracelet Girls, Asta, Kenshiro, Light Yagami, Ryuk, Dai, the Forger family, Kafka Hibino the Monster #8, Chrome the Gear, a Slime, Gabimaru the Hollow, a princess wielding an "Ex", Kai Iod, Chloe Love, Ushio Kofune, the Chainsaw Man, and Damien, the Captain Velvet Meteor. With the others being behind.
"Oh, it's some of my old targets, and some new faces." Prometheus noticed.
"Who're you?" Damien asked.
"I am Prometheus, destined to rule Jump and the real world!" Prometheus introduced himself. "Now with the power of the Infinity Stones and the Evil Omni-King, and so much more, I will have revenge!"
"Finally! You've arrived, guys!" Xiaomu exclaimed.
"In some way or some form, there's still hope for us." Noah told Prometheus. "And none of us is giving it up until we have succeeded in the end!"
"Very well." Prometheus responded. "And there's me, thinking that I'm now unopposed by the Shōnen Jump and its inhabitants!"
"Fight!" The alliance then Shōnen Jump go to fight. Minutes-long violence and creative blows ensued.
"Bruh, Angela just broke down." The mad scientist, the God-Scientist, is disappointed. "I just hope Director Glover end them all."
"Doctor, you still call Prometheus as Director Glover?" Rigna asked the God-Scientist. "Don't you realize that it's just a disguise?"
"Yeah, I know, but it's more endearing that way." The God-Scientist responded.
"Well, yeah..." Rigna replied. "However, I'm rooting for Mr. Prometheus to win this."
"How about you, missy?" Rigna looked to a woman.
"By blackmailing the Super Sentai and the Power Rangers, I have aggravated various celestials and the alternative versions of those Azure lowlifes all at once." The woman explained how.
"Good job, woman." God-Scientist approved. "This gave us time to manipulate every single ultimate monsters various of those annoying mechas have dealt with."
"I did it. Thanks for the approval." The woman responded.
"Because suddenly, everything that transpired led those pilots to rage against the reality..." Rigna exclaimed. "I mean... our reality."
Now, the alliance, while beaten up and bleeding, are trading blows with all their strats and abilities against the Daikaiser. Impressed by the teamwork, creativity, making best use of each respective powers and determination, Prometheus laughed.
"You're far better than I thought." Prometheus laughed.
"Hahaha! Cringe!" Hajun made fun of Prometheus.
"However, because of this, I will go overboard just to destroy you!" Prometheus flew above.
"Not good! He's removing his restraints!" Mii is shocked. "Everyone, guard the protection!"
Both Strange and Fuuka then went enhancing the protect spell.
The portal has more people from Jump already, but there's three Riders in.
"Activate, Infinity Stones!" Prometheus then activated the Infinity Stones in him, making them glow as well.
"Prometheus... I know you're backstory thanks to Shinra's scanning! You were originally a storyteller, who made the histories of Jump worlds appear in the minds of manga artists back in the day." Supreme explained. "However, you then suddenly decided to improve the world by showing them the folly of the fools in Jump. However, once you saw that it didn't work at all, you began your plan to merge the worlds to control them directly."
"I've retrieved an Umbran Cube, a device which you created just for your merger plan, capable of empowering and corrupting people." Supreme showed an inactive Umbran Cube.
"You're saying that I eventually went too far as a storyteller?" Prometheus asked.
"Ever since you went for the folly, you stopped appearing in the artists' imaginations." Supreme continued. "And once the folly failed to do the trick, your fucked it and went for the merge."
"You really have the nerve to make fun of my backstory." Prometheus looked down upon. "Very well, another reason I will exterminate you!"
"Stop!" Two Riders stood against Prometheus.
"Saber! Ohma!?" Shinra and Ouma agents is surprised. "Decade too!?"
"Sorry for making you wait again." Decade Complete 21 apologized. "I'm just a Rider passing by. Remember that."
"For what you did, you'll be ended by us!" Almighty Xross Saber declared.
"A former storyteller fallen because of the folly of the fools, going on trying to merge the worlds..." Supreme described Prometheus. "Now he wants revenge by destroying everything."
"I see." Ohma Zi-O understood.
"Three of the strongest make no extra difference to me." Prometheus said. "I more than powerful enough to erase their existence."
"Hold on, everyone!" Gogeta warned the alliance. "That man could wipe us all any time!"
"Mister, how about the so-called Spirit Ball?" Meteor suggested.
"Kid, why didn't we think of it before?" Vegito asked Meteor.
"I only know it's a very large ball of energy made by the power of everyone." Meteor explained.
"Dude, why didn't we try to do the Spirit Bomb?" Vegito asked.
"The problem is... Who's gonna do it?" Vegeta replied.
"Alpha Omega Titanomachy!" Prometheus used the Infinity Stones to create hundreds of glowing cubes around the alliance.
The cubes then lifted into the air and went directly above the alliance, with five orbs splitting from each cube and turning into lasers. The lasers circle each cube and circle back into it (while the alliance is dodging them all), combining into a large tornado that becomes a massive laser per cube. Resulting in hundreds of massive lasers blasting.
Saber used the power of the Haouken and Wonder Almighty to protect the alliance by blocking the lasers with the arcs from a wide slash.
"Look at you, the fallen storyteller." Ohma Zi-O told Prometheus. "Still didn't realize the errors in your way, even after your original defeat?"
Prometheus simply used the middle-body set of Infinity Stones to fire a thin laser, and that exploded the ground got by the said laser, knocking some of the alliance away.
"Wow, look at the armor of the one manipulated us." Darkseid appeared alongside Shao Kahn.
"Darkseid, can you help us, our old nemesis?" Superman suggested.
"Ok fine!" Darkseid agreed.
"Ok, because I'm fed up with this woman who broke the omniverse." Shao Kahn agreed. "I'm Shao Kahn, Konqueror of the Realms!"
"Isn't it Dark Kahn?" Prometheus recognized.
Darkseid then fired Omega Beam, but the Daikaiser's armor literally reflected the beam.
"It doesn't work?" Darkseid is confused.
Prometheus then emanated his power and started posing like Hajun, much to the latter's shock.