Spoilers from included and/or represented works abound. Please read this fiction carefully.
The bubble in the rift bursted, and the ocean under fell. The dual island then also fell with the water, falling out of the rift, which slowly closed as the dual island passed by. Singularity teleported out of the way, and the dual island fell down, crushing the Athena and brutally shattered from the impact. All three destroyed and crashed down in the Sea of Blood, creating a 360-degree tide so strong, it's nearly high enough to take any of those flying vehicles down.
"Oh my goodness!" Hoshimatsu is shocked.
"What the fuck!?" Viola is shocked.
"Hell comes loose!?" Gebura is shocked.
"Give me the Sword of Reality!" New Ben Tennyson shouted.
The Sword of Reality suddenly telekinetically flew to new Ben's side, with him catching it, much to the alliance's shock.
"Oh yeah, there's the Umbra-Lumen..." New Ben stabbed the sword down and reached for his Omnitrix. "Bayonetta, I need you!"
New Ben transformed into (Prime) Bayonetta, the 'brave Cereza', and took the sword.
"Wait... That version of Mummy..." Viola recognized the form.
"I told you all..." New Ben posing as Bayonetta. "Don't fuck with a witch!"
"What!? That witch!?" Singularity reappeared. "Who!?"
"Then I shall exterminate you all!" Singularity then attacked new Ben.
Singularity fired an overpowering shot, but new Ben, as Bayonetta, took the gun and shot, countering the projectile and exploded it in purple.
"How!?" The Singularity is frustrated.
He charged towards new Ben, but Ben just slashed the sword.
"Arghh!!! How could you!?" The Singularity is hit.
The Singularity then went to crash the Shin Halberd, which new Ben, Viola and Hoshimatsu is standing. The airship started falling down, much to the panic.
"Shin Halberd is falling down!" Hirume threw a tantrum.
New Ben teared a heart from him (as Bayonetta), and empowered with the blood.
"Do o ia Bayonetta! Cnila d comselha odo ananael! Ipamis noncp fafen niis! Avavago tliob vran!" New Ben summoned Sin Gomorrah.
Sin Gomorrah emerged, then knocked Singularity in the air. New Ben then empowered again.
"Do o ia Bayonetta! Cnila d comselha odo ananael! Turbs c babalon zonac ciaofi balzarg! Fafen niis!" New Ben summoned Queen Butterfly.
Queen Butter appeared in her usual gargantuan size, and carried the Shin Halberd, preventing from falling.
"System, now!" New Ben shouted to the System. "Before Singularity has a chance to refocus and get back and attack us!"
Queen Butterfly is carrying the Shin Halberd and running across the Sea of Blood, while Sin Gomorrah is distracting Singularity.
"I was born to new possibilities." System No. XX closed her eyes, and raised her hand.
The Keystones telekinetically and telepathically went back to System, much to Singularity's shock.
"What!?" Singularity noticed. "How could a machine steal its key, which is mine!?"
The Keystones fused and turned into what's basically the top parts of her machine form.
System No. XX flipped off Singularity, with the middle finger even extended into a levitating sword like one doing in her machine form. "Come and take this and get us!"
"Agraa ors, taba ors, avavago!"-"Isious hononol obelisong!"
"Omne, the Controller of Creation, has arrived!" Woz rejoiced.
"What the fuck!?" Singularity noticed Omne.
A Sideways Rift appeared on top of Omne, revealing Aesir, returned to normal and balanced, free of Sigma Virus and the brainwashing from Genjitsu-no-Omnia.
"No... Aesir!?" The Singularity is shocked.
"We meet again, the man out of context." Aesir saw the Singularity.
"Impossible! Sigma-Virus is no more, so you returned to help them!?" Singularity is enraged. "Then I'm afraid I'll destroy you all, and your so-called, self-proclaimed 'unshakable' truth!"
Omne winked and then flipped off Singularity with both hands.
"That one summon just arrived in time." Loptr, the evil personality of Aesir, commented.
"You're the Singularity?" Loki, the good personality of Aesir, questioned.
"Precisely. I am Singularity!" The Singularity confirmed.
"Lord Aesir, can you and Omne destroy this fucking amalgam Homunculi for us?" New Ben then detransformed. Sin Gomorrah and Queen Butterfly disappeared.
"Ben Tennyson, enough!" Viola told new Ben. "Let's transfer to CXA's airship!
Mercurius teleported every single ones at Shin Halberd to CXA's airship, and left the Halberd to fall down, but not before Aesir telekinetically grabbed it, crashing the broken airship onto Singularity. The rest of the vehicles then flew away.
"Lord Aesir, you've betrayed us." Singularity teleported to Aesir, then choked him.
"Ghhh!!!" Aesir struggled to get out, and Singularity kept the hold.
Them the sky became TV-static, distracting Singularity, and allow Omne to save Aesir by the flinging the Singularity with her finger.
"That summon actually saved us..." Loki (good) commented.
"Allon'sy!" The 10th Doctor exclaimed.
The Singularity fell down to the Sea of Blood, right at the remains of the islands.
"Did we do it?" System No. XX wondered.
"It seems like the Singularity is smacked down to the remains of the islands that got destroyed." Ms. Continuum saw it.
"The we did it, Con-tan!" Hoshimatsu replied.
"Yeah, then we win!" Alternative Thor exclaimed.
The Guardians of the Multiverse them decided to celebrate, but is immediately interrupted by Rise.
"No! Not yet!" Rise refuted.
"Miss Kujikawa, why?" Hoshimatsu asked.
"The Singularity can assimilate anything he accepts, and with those remains..." Rise responded. "He's going to become a monster larger than Bionis or Mechonis!"
"What!?" Everyone is shocked.
Not long after, a gigantic monster - similar to the Devourer from the island, but with Mecha Team Leader for the armor, covered in terrains of the islands that were - emerged from Sea of Blood. So large, even its hands visibly dwarfs Omne's own body, and its body mostly likely noticeably larger than that of Bionis or Mechonis. It's skin ia based on Singularity (Amalgam) and the islands and its terrains. The armor is golden with blue accents, like a combination of the golden Cube and an Homunculi like Singularity.
"No... This can't be!" System No. XX is shocked. "That must be... Mecha Singularity Devourer!"
The monster roared an extreme roar, nearly bursting humans' ears.
"Eeek! I'm scared!!!" Sheath is scared.
"Don't you see?" Singularity, who turned into a monster. "Your resistance is beyond futile. Your life is disposable."
"I am the one to decided what the truth is, and the passage of fate that follows!" Singularity boasted.
"That monster turned into an abomination!?" The first five Doctors and the War Doctor are shocked.
The sky turned back to TV, causing everything there to turn out and sucked out, the reverse version of the same way the new Investigation Team fell into the TV world. Singularity roared at it, then the scene turns to Aionios.
"Aionios, here we come!" The Singularity then fired a mouth fire into the sky up, creating a massive rift.
Unbeknownst to him, Arc Gurren Lagann is packing with the enlarged Zenkaiju-Oh.
"Hey, you!" Simon the Digger shouted.
"Simon the Digger, why are you here?" The Singularity noticed.
"We knew Aionios would be tagged with the TV world, as shown by your mere presence here!" Viral argued.
"It's our turn!" Zenkaiser and Saber then proceeded.
Arc Gurren Lagann then beat up the Singularity, while avoiding any of his attack. The remaining vehicles is now flying alongside some Ferronis from the City.
"You're...!" Monica Vandham noticed.
"It's us! The Ouroboros!" Noah greeted. "And we have some helps!"
"Why those silvery Gundams!?" Monica complained.
"Actually, these are Gundams chromified!" Angela clarified. "Who injected Chrome onto those man-made robots!?"
Omne is now standing in a puddle of Chrome.
"What?" Aesir is confused.
Chrome spread into Omne, just started covering the legs.
"Look!" Rise saw it. "The Chrome is spreading to the Controller of Creation!"
The Investigation Team gasped at the sight. Singularity roared again, proxy distracting the City people in the process. Meanwhile, Ikue Higashi(?) as Cure Union and another magical girl are sitting on top of the chromified Urayan Mountains, laughing at Omne as the Chrome spread over that goddess.
"It's Chromne!" The two laughed as Ombe is consumed by Chrome.
"Lord Aesir, jump up!" David told Aesir. "The Chrome could consume you!"
Aesir listened, and then jumped, just as the Chrome cover Omne and went over.
"Object!!!" Singularity then took the chromified Swordmarch - originally Mechonis' sword - and swung towards Arc Gurren Lagann.
Arc dodged the sword, and shot the Super Sentai powers to the Singularity, which only stunned the monster.
"Fucking gracious!" The Zenkaigers are frustrated.
"Damn... It isn't all that effective!" Viral is frustrated. "Simon, we go air!"
Arc Gurren Lagann jumped up, and flew to the space.
"You don't!" Singularity tried to reach the Arc Gurren.
Sin Gomorrah blocked the claws, busted in the process. Queen Butterfly then grabbed Singularity's now-monstrous arm. It was System No. XX who summoned both this time.
"You still playing summon?" Singularity then threw Queen Butterfly away with the other hand.
The singular eye gazed at System No. XX, who was performing the summon.
"You're next, girly machine!" Singularity then reached to CXA's airship, trying to destroy System No. XX.
Both Bionis and Mechonis blocked the Singularity, saving CXA's airship and thus System.
"How!? Not even an ordinary god can sway me forever!" Singularity noticed.
"You fucking defied our nerves." Meyneth sweared while controlling Mechonis.
"You are anomaly!" Zanza is controlling Bionis. "This is getting ridiculous.
Singularity shunted both gods, and stepped back a bit. This is getting ridiculous.
"Hey, you, scientist gods!" Singularity called out both.
"You're the God-Scientist, so you just became hypocrite." Meyneth noted. "Also, why would you dare threaten the peoples!?"
"Your fate is mine to proceed, not yours!" Singularity tried to attack, but is bombarded from behind.
It was Agnus and Keves, whose respective castle turned into mechas again and attacked Singularity from behind.
"Insolent!" Singularity got up, and is surrounded.
"Take care of the Singularity for now!" Simon told the Queens of Aionios, Zanza and Meyneth. "We'll take Super Galaxy Dai-Gurren!"
The four mechas defended from the Singularity, and fought good. Mechonis even took back its sword (Swordmarch) and used it against the Singularity. The vehicles and the rest of Ferronis flew away for safety, with the chromified Gundam chasing them all.
"We have to go." Union told the magical girl.
That magical girl in particular has the same skin tone, similar hair with the same colors, same eyes but glowing, and similar build, as a certain Herald... The dress in particular, and the outfit in general, parodies the Bloom assassin and whatever the Last Reality, with touches of Chrome. Makeup too, but very similar to that Herald as well.
Both magical girls then ran away for safety, but is blocked by Doctor Manhattan.
"Dr. Manhattan! Why are you blocking us!" The magical girl complained.
"I recognize you." Dr. Manhattan revealed. "You're the Herald, the Nothing's woman, only as a magical girl."
"What!?" That magical girl is Herald!?
"Why are you interfering with our directive?" Union questioned.
"Oh, you're the same one who betrayed Echo." Dr. Manhattan recognized Union. "Why you beat her up?"
"Don't ask." Union threatened Dr. Manhattan. "Or I will kill you."
Dr. Manhattan simply teleported away, allowing the two magical girls to escape.
Meanwhile, Bionia, Mechonis and the Castle has been greatly damaged. The Singularity tried to finish them all at once.
"You shall be extinguished!" Singularity then set himself up in flames.
Then Singularity is about to detonate, which would destroy Aionios, thus annihilating its (now technically-split) components, new Bionis and Alrest, as well as everything in all those, including the mechas.
"Is this the end!?" Queen Nia is shocked.
"Over there!" Super Galaxy...
"What!?" The Singularity noticed something... wrong.
It was the Super Galaxy... Don-Zen... Onitaijin!?
"Not this mecha again!" The Singularity is frustrated.
Bionis, Mechonis, and both castles all disappeared from Singularity, to drive home even further.
"Impossible!" Singularity is enraged, and jumped away.
The vehicles and the CXA mothership are all now integrated into the combined mecha now, giving it even more power. Additionally...
"Use the Monado!" Bionis, Mechonis and both castles connected each other, and created an appropriate Monado for the Super Galaxy mecha.
"Super Galaxy Monado!"/"超銀河モナド!" The alliance and the CXA shouted, now wielding that Monado.
"You shall not get away!!!" Singularity then unleashed, turning into an all-killing meteor flying equivalently to a speeding bullet.
The combined mechas then swung down towards Singularity, and with the Monado, managed to cut him down in half.
"No!!!" The Singularity is destroyed. He exploded in an extra bright flash.
The Monado swinging, accidentally cleaved the Aionios in half, physically splitting neo-Bionis and Alrest. This however, became violent enough to instantly triggered a double Annihilation Event, wiping out both worlds at once. All its habitants that's inside the combined mecha are flabbergasted at the result.
"Oh crap..." The Ouroboros fell down to their knees.
"Uh oh, we just went way too far on this one." Zenkaiser responded.
Both Queen Melia and Queen Nia facepalmed, while Shulk, the Aegis, and friends are shocked.
"We just lost two worlds..." Noah regretted. "Ours, to boot."
However, someone snapped the Infinity Stones, and the neo-Bionis, Alrest, and its worldly bridge Aionios all returned, as well as reviving all the dead habitants who's died in this incident. This came as a shock to the Ouroboros, Kevesi and Agnains alike, as well as Shulk, the Aegis, Zanza, Meyneth, and their associates.
"Who snapped the worlds back!?" Noah is surprised.
"I did." Thanos revealed, wearing the stacked Infinity Gauntlet. "Three sets of Infinity Stones work wonders."
The onboard one that inhabitanted neo-Bionis and Alrest and Aionios all celebrated. The combined mechas took off Monado, splitting Bionis, Mechonis and the castles.
"Never though this useless atack can be used to restore fallen world." Mercurius commented. "I'm genuinely surprised that twist actually worked."
"Sounds weird, but alright!" Deadpool responded.
The combined mecha is decommissioned again, and everyone went back to Aionios to camp. Angela placed the Library on the view of Urayan and Swordmarch, and sorted out things. What a crazy day for the alliance and the CXA together!