Spoilers from included and/or represented works abound. Please read this fiction carefully.
"That's it." Agent Jones noted. "It's happening!"
"What's with the Collider?" Ren Amamiya asked.
"Ok, now that it's covered by that substance from the Last Reality, that will activate the corruption on the other side." Agent Jones replied.
"Why does she make us keep trying to save the reality?" David sighed.
"Good. We made it." Reiji concluded. "We rescued some Loopers and more, and we're getting better."
"Corruption awaits, but we should be safe for now." The Cube Queen responded.
"Warning: rotation at 60 degrees."
"Guys, how did we hear it?" Lex Luthor questioned.
"I'm projecting from the POV, and stabbed the sound." Dr. Manhattan revealed.
"I have a Vision, and there'll be two megtsunamis, one normal and one corrupted!" Shulk warned everyone. "Deploy the shields in full force, now!"
The island-ship fully activated the shield, on the behest. "You good?"
"That's better." Shulk calmed down.
"Brace the impact already!" The Foundation told everyone.
The pulses suddenly ruptured, reaching the island-ship. The corrupted image completely decayed and disappears. The island is running, and is steadily returning to its flip. The corrupted remnants and the washed-out terrains is slowly revealed from emerging. And once 90 degrees is reached, it's tipped back off, perfectly in opposite directions as originally was, and the island descended, spatting the ocean upon impact sand rise, creating a mega-tsunami.
Corrupted Apollo is here. And the Collider exploded, bursting into what would otherwise be a reality-ending explosion into the ocean, causing another mega-tsunami, a corrupted one, on top of the normal one caused by descent. Both spontaneously and quickly hit the island-ship, reaching to the level of buildings facing up. This would've splashed the ship and thus (potentially) have knocked it down to the ocean if the shields weren't fully deployed.
The Re-Flipped Island is clearly a washed-down version of its last moments till the original flip, with the remains of the two Abductors stuck around on the flipped up edge and around a mountain (gameplay: likely Mount F8, possibly Mount Kay), the corrupted biome being the same but inactive, and the results from the submersion showed.
Energy fluctuates everywhere in and around it. Beyond the Edge slowly approaches and magically floats in the ocean like a not-so-heavy ball in a deep large of water.
Noon...
"I corrupted it before." The Cube Queen recognized. "The greatest prize laid bare, accurate to sub-microscopic precision."
"I feel an air or watered dread..." Agent Jones observed. "This is what reversing the gryoscope orientation drown the Cubes in..."
The alliance explores the corrupted island, revisiting what Apollo the island is, and found all sort of ruined landmarks virtually everywhere.
Coral Castle is the least directly affected, because it's based from the water, having emerged after the flood subsided back in the day, meaning that the major source of ruinate of this is due to the recent corruption caused by the submerged Chrome Collider.
Afterwards, the alliance returned to the Pyramid. The Cube Queen is happy.
"So nostalgic! So beautiful!" The Cube Queen is now drooling over the Pyramid.
She waved, casted lightning onto a corruption patch. Suddenly, the corruptions are all activated, reactivating the Cubes and powers the Pyramid.
"Thanks all!" The Cube Queen then floated away and up top of the Pyramid.
Both Doctor Strange appeared, and have the Hegemonies and various others help thr protective spells, casting the magical armors onto the entire alliance. Most (and relatively smaller) mechas floated back to their normal size.
The Cube Queen then briefly trapped herself in a sphere.
"Wow, just like before." The Loopers, and the Ice Royals, the two surviving (the Ice King and the Ice Queen), looked at the sphere.
The sphere broke, and the Cube Queen fired a massive corrupted beam to the sky. This hit the crack in the sky, not only instantly opened a rift to the Last Reality, but also instantly broke the sky itself, causing the Last Reality to cover the sky itself (much to everyone's shock).
"What the fuck!?" The agents of Shinra are flabbergasted.
"How did the sky turned into Last Reality...!?" Saya is shocked. "Wait... you hit the crack in the sky!?"
"Wow, didn't expect something like this to happen." The Cube Queen stopped.
The rift is still on, and the Last Reality is able to invade now.
"Wow! You just accelerated my plan!" Genjitsu-no-Omnia's voice. "You opened the Last Reality yourself before I could!"
"Hah!?" The Cube Queen is jumpscared.
The Origin catches the Cube Queen and flew back down. "How!?"
"Didn't expect you to help me." Genjitsu-no-Omnia appeared on top. "Welcome to the next stage, the resistance and the Unchosen."
"Why are you rooting with us, our existence, and all realities!?" David angrily asked.
"I shall become the one to jump up beyond from where not even omnideities can even dream or imagine of surviving even getting close to!" Omnia boasted. "I shall rule the omniverse as someone who's exceedingly overwhelmingly beyond omni-deity!"
"Boast all you want, but the omniverse would be worse off with your rule, so..." Agent Jones argued. "We must kick your ass and save the reality!"
"What you've done to me for the equivalent of over a millennia proves my point, and you still defy me?" Omnia questioned.
"We have to." Ariana Grande argued. "You broke the omniverse over something that's too trivial."
"I'm going to merge the Zero with the Last Reality, then the play will begin!" Omnia floats up. "This is the awaited revenge against the seven, IO and the Last!"
"You're too far gone!" The Cube Queen argued. "I should have disciplined you in the first place!"
"You shit the Reality Zero, the omniverse 'd be in danger." Viola argued.
"Your actions has consequences." Dr. Manhattan argued.
"Your desecration of reality will not go unpunished." Strange Supreme warned.
"Cross All, save the reality!" Ms. Continuum yelled.
Everyone then emanated the powers and energies linked and combined together, as represented by their colors glowing.
"Destroy them all, my saviors!" Omnia summoned Cube Barricade in the corruption lines, then with that summoned various creatures who lost their existence and/or previously ceased to exist.
The alliance has the mechas and creatures larger than buildings out for Dai-Gurren. Then, they saw monsters taking in forms of no longer existent creatures and warriors from various worlds.
"Mummy!? Daddy!?" Viola is terrified of seeing variations of Bayonetta spawning like this, as well as clones of Luka Redfield in faerie form.
"No... the manikins!" The Champions of Dissidia is shocked, seeing the corrupted manikins.
"Not the Shadows!" The Shadow Operatives is shocked to see the Shadows Selves spawned. Not only of S.E.E.S. and the Investigation Team, but the Phantom Thieves of Heart as well, and they all even has brightly glowing magenta eyes.
"Not again!" The CPUs noticed the Dark CPUs spawning, and...
"Hello. I'm Kurome Ankokuboshi, and I'm going to destroy you all... including me." Kurome Ankokuboshi is spawned from Cube Barricade.
Kurome transforms into the HDD variation of Dark Orange, Delusional Orange.
"Shit!" Uzume is shocked.
"No...! Mom...!" Kiana is horrified, seeing the clones of Cecilia Schriac emerging from Cube Barricade.
"Another Riders again!?" Sougo Tokiwa as Ohma Zi-O is frustrated.
"Those monsters... They're taking forms of those whose existence is lost!" David realized. "Everyone, you ready!?"
The monsters approached members of the alliance, and CXA took the command.
"In the name of Continuum Exploitation Authority..." Ms. Continuum commanded. "Fight!"
The war starts there. It's all vicious right here. The monsters has the abilities of whatever it's taking the form(s) of, leading to not-so-predictable clashes and beatdown. They didn't considerably more damage to the enhanced protection than Prometheus previously did, and did that much faster.
"Show no mercy!!!" Omnia yelled.
System No. XX summons the Cube Queen's staff, the Reality Render, and Viola's sword, Mabu-Dachi, at once, and threw them to David.
"Use them!" System No. XX tells David to.
David takes both weapons, alongside the normal version of Rebecca's shotgun, and ran ahead. He slices various corrupted monsters on the way, but is suddenly attacked by a monster Cecilia. David blocks the attack, trigger Witch Time which automatically activated Sandevistan.
"Finally, this sword is better with me!" David noted, then headshot monster Cecilia. "Let's try this... staff from the Cube Queen, shall we?"
David used the Render, and conjured a corrupted energy wave himself, blasting the nearby monsters, which were attacking One Zenkaiser and Yukimura Sanada. Sandevistan deactivates, and the monsters suddenly gets destroyed from the wave.
"This staff is ludicrous, capable of breaking an universe at whims!" David now knows. "Just the staff the Queen of the Cubes needs!"
"Thanks!" Yukimura thanked David.
"Oh, well, holding the Cube Queen staff is powerful." David noted.
David took the weapons, and have since used it to destroy the corrupted monsters raging throughout. Meanwhile...
"Hey, Queen! You know what's crazy?" Agent Jones is fighting alongside the Cube Queen. "You gets to become a Seven-armored woman!"
"Huh?" The Cube Queen is confused.
"Mr. Atsuta exploited another Zero Shard he got thanks to extracting the power of Zero Point, and had it engineered by the Seven and Ms. Urashima." Agent Jones showed a Chrome-coloured crystal ball. "The new gadget, a crystal ball that can create."
"What? A crystal ball?" The Cube Queen holds the gadget.
Then a monster Shadow hit the Cube Queen, dropping the gadget. The gadget took no damage, while Agents Jones punched it, destroying it instantly.
"Don't worry, this crystal ball is impact-proof." Agent Jones reassured.
"Uh, thanks." The Cube Queen then retrieved the gadget.
The gadget spawned nanomachines which looked like Chrome, which freaked her out. The nanomachines then stucked to her chest, giving her an jetpack like that of the Seven. Cue the initially uncontrollable flight.
"Woah! Woah! My children, help me!" The Cube Queen is flying uncontrollably.
A Caretaker then appeared and tried to catch the Cube Queen, but she simply went right through, destroying the monster she called. Suddenly, she gets back control.
"Why? Why this jetpack?" The Cube Queen has no idea, but she floated back to normal, and is controlling the flight now. "I didn't need that, I can float by myself."
Suddenly, an air-tight armor built around the jetpack, instantly covering her body. The design is a sleek futuristic version of her normal design, with adapted elements from the Origin's armor and the Herald's clothes (but recolored) as a basis. The palm keeps the blue shades of finishes, matching with the Cube Queen herself.
"How? This suit... It's like the seven's!" The Cube Queen is surprised.
She then took her staff, and pushed a button near her head. This put on the helmet, which has the frame being the sleek, futuristic version of her own head (minus the hair), holding the visor which wrapped around her face, much like that of the Seven. The bodylines briefly glows, and the visor shows things typical of the Seven (and even represented by those red lines and graphics in the black background), just adapted.
The Seven just happened to be looking at the Cube Queen. Especially the Origin.
"Wow, you just gained our portfolio!" The Paradigm noted.
"Why this thing though?" The Cube Queen still has no idea. "I'm the Queen of the Cube, not one of your-"
"I hereby make you..." The Foundation interrupted, then briefly kneeled. "... the Queen."
"Oh yeah... Gotta go destroy all those trash!" The Cube Queen, now known as one Seven Agent as simply the Queen, flew away with her staff, and casted various reality-breaking spells to destroy corrupted monsters. Her spawned monsters follows, and help to kill off the corrupted monsters.
A while afterwards, the island shakens, shocking everyone on ground.
"What!? What's going on!?" David questioned.
"I merge the Zero with the Last Reality, and therefore, shoving the in-between and the sideways dimensions!" Genjitsu-no-Omnia revealed.
The Cube Queen realized the true plan as well as David on the ground. She flew down to him.
"Why are you having a clone of my-" The Cube Queen asked.
"Cross-Dimensional Observation System No. XX gave me that." David replied pre-emptively. "Also, we felt the ground shaking."
"I heard it! The in-between and the sideways is merging into this mess!" The Cube Queen reported.
"Hey, miss!" Roland caught up.
"Mr. Fixer, Reality Zero is merging with the in-between and the sideways, one step closer to merging with the Last-" David explained.
The sky suddenly flashed, briefly blinding the alliance. The flash slowly subdued, revealing a light grey horizon around with floating white orbs scattered around. White lines that appear in an almost circuit like pattern... Inside the white orbs, there's the gateway of the Sideways each... Reality Zero itself is now stuck in-between, and the Sideways now appears all over both it and the Last Reality, through the said white orbs.
"She actually did it." The Cube Queen collapses her visor. "The in-between and the sideways got merged, and the world with the island is stuck."
The Cube Barricade suddenly exploded, and Pyramid started to crack. The explosion brought thousands more corrupted monsters, just as when the boosted perfection spells started expiring. Strange Supreme refreshed and restored the said protection, and then summoned Shuma Gorath. He passed out afterwards.
"Mr. Supreme!" Sora approached his body.
"Someone heal him!" Mickey Mouse and friends realized. "Hello?"
"I'm on it!" Soren approached Strange Supreme, and started healing.
Shuma Gorath wreaked havoc and attacked the corrupted monsters, helping the alliance for all.
"Wait a second..." David realized something's off. "She Geassed the entire Last Reality!"
"No!" The Cube Queen yelled.
"She really is able to Geass an entire universe, just as we all investigated such." Roland noted. "This is made for this, merging Reality Zero and the Last Reality together!"
"You dare abuse my people! You dare threaten my children without cause!" The Cube Queen put visor, and quickly flew up.