Disclaimer: I do not own Arrowverse or Marvel Cinematic Universe or X-Men or anything else you may recognize.
When they came to, they saw a hole in the ceiling and flames ravaging the skies, with Apocalypse floating above, forming a barrier to protect himself from the flames.
"No, not again…" Logan whispered.
"What is that?" Barry asked.
"Our biggest nightmare, guys." Cyclops said.
Apocalypse formed a barrier as the flames of Phoenix surrounded him but sensing it give in, Apocalypse roared as an explosion of energy followed, sending Jean flying back, while fiery aura surrounded her, her eyes blazing. She slowly started to incinerate Apocalypse but he healed almost instantly before he used telekinesis, sending her plummeting down to the ground but Jean recovered and using telekinesis, she attempted to crush Apocalypse as his armor was cracking and twisting bit by bit but Apocalypse formed an energy ball in his hand, blasting Jean, sending her flying back before Jean recovered.
"You think this is the first time I have been burned? I've risen from the ashes before as well!" Apocalypse snarled.
"You will pay for trying to take me!" Jean yelled as she and Apocalypse exchanged blows and even though Apocalypse's fists were quite painful, the Phoenix Force helped her endure, while she was making cracks and dents into Apocalypse's armor.
"She just might have a chance of beating him." Oliver said.
"But what about the world?" Steve noted before they heard some noises and realized they had forgotten about Thawne as they turned to see him on some platform, typing commands as he started to fade away in some light.
Barry sped at Thawne, about to grab him but Thawne had teleported himself but Barry saw through the shimmer some pyramids in Giza before he crashed on the floor.
Apocalypse roared as he aimed his hand at the ground beneath him as a beam of light shined from the tower into his hand and channeling the power, Apocalypse sent a barrage of beams at Jean, who created a barrier before she screamed and a shockwave followed, shattering glass and making dents and cracks into buildings beneath them, knocking the heroes off their feet as they stared above at the battle of Titans.
"Can we stop her?" Steve asked as he got up on his feet.
"It would take a miracle to stop her." Logan said.
Thor had heard only stories about the Phoenix. It was a force of nature and it was possible it could defeat Apocalypse… but considering that she was angered, who was to say that it was not going to unleash its wrath upon the entire universe? He stared in horror as he realized one dreadful truth, no matter whether Phoenix or Apocalypse wins… everyone else loses.
Suddenly, Apocalypse and Jean teleported. They couldn't see them… but they could hear the fighting… the echoes of blasts… the destruction…
Paris, France
"I am a god! You can't defeat me!" Apocalypse yelled as he and Jean flew above the Eiffel Tower, the flames ravaging he building as his armor kept cracking before he punched Jean, sending her flying back.
People down scattered and ran as everything was crumbling.
China
There was a breach in the Great Wall of China, when Apocalypse was standing his ground, absorbing the energy of Phoenix and roaring as a pulse of energy followed, shattering a big chunk of the wall as Jean was pushed back. Jean's eyes blazed with fire as she unleashed a torrent of fire, burning down the woods around as mountains crumbled as Apocalypse's armor was giving in but his gauntlets started to overheat as he laughed.
"Yes… more… more!" Apocalypse said, as flames blazed around him.
Jean screamed, as she kept emanating more of the Phoenix Force, while throwing debris at Apocalypse, doing whatever she could to hurt him but Apocalypse ignored all the cuts she managed to do to his armor as it was being dismantled but he kept absorbing the energy with his gauntlets as his eyes glowed.
New York
They kept teleporting across the world and fighting until in the woods outside the city formed a giant crater, burning everything around as Apocalypse raised his hands, absorbing the aura as Jean breathed out, feeling weaker as she realized that Apocalypse was draining her of the Phoenix Force.
"You don't deserve this power… I am the one true god!" Apocalypse yelled.
"No!" Jean yelled, forming a shockwave, burning Apocalypse's flesh as his armor was slowly dismantling before it was recovering.
"Jean, you have to stop! You're taking the whole world apart!" Xavier called into her mind.
"Jean, I want to take Apocalypse down as much as you do, but not like this! Not at the cost of destroying billions of lives!" Cyclops said, talking with her through Xavier as Jean saw for a moment a projection of Cyclops in front of her, awakening some humanity in her.
"I have to, Scott. It's the only way." Jean said.
"I don't believe it… because I know you. And I love you. And I know you know deep down that this isn't right." Cyclops said as Jean felt tears on her cheeks.
Jean screamed, trying to push Apocalypse back as he grunted, roaring, sending a pulse of energy as the clash of pulses formed a shockwave, shattering the trees around them.
Sanctum Sanctorum
"We need to stop her before she takes the whole world apart." Strange said.
"I agree, mate." Constantine said as he and Zatanna and Strange and Wong formed a circle and started to say an incantation.
New York
A giant dome formed of Tao Mandalas surrounded Apocalypse and Jean as they were both surrounded by flames. They both roared, their skin being burned off and at the same time reforming and then a giant pillar of light surrounded by flames breached through the dome, shining into the skies.
The heroes approached the dome as the forest around them was burned into ashes and the flames were being extinguished as they took a closer look.
There was a giant crater with two figures in it. On one side was Jean, lying on the ground, unconscious and naked, her clothes burned off because of the Phoenix Force, covered in dirt and ashes. On the other side was Apocalypse, seething as he was singed and skin burned off but it started to reform as the trees and plants started to wither and die, with Apocalypse draining them to heal himself.
"You can… never… defeat a god…" Apocalypse gloated, panting out but still had enough breath in him.
"You are no god!" Thor yelled as he attempted to cut Apocalypse's head off with Stormbreaker but Apocalypse used telekinesis and ripped a tree off its roots, sending it at Thor, knocking him back.
Apocalypse pulled unconscious Jean towards him, placing her on his shoulder before he vanished in a shimmer.
Cyclops attempted to blast Apocalypse but the optic beam just went through the shimmer.
"Where did he go?" Logan wondered.
"Home." They turned to see Doctor Strange come out from the portal. "He is going to use them for a ritual in Egypt."
"What ritual?" Oliver asked.
"Ascending. He has all four mutants he had been looking for to ascend and empower himself. Right now, he is weakened, but if we don't stop him now…" Strange trailed off.
"We have a literal apocalypse on our hands." Barry finished and Strange nodded.
"I know what is he planning and we have a small window to take him down. But we have to act immediately. Listen…" Strange gave them all an imploring look. "We're in the endgame now."
Battle of Titans like this one isn't my style, so hope I did good here. Honestly, not really proud of this chapter, but I didn't want to make this too easy and I tried to make this not too anticlimactic, not sure if I succeeded in that.
Now, under the normal circumstances, I'm pretty sure Phoenix Force would trump Apocalypse, but don't get me started on how stupid it was in the film, especially with the later inconsistency, when after X-Men: Apocalypse followed Dark Phoenix, creating a plot hole as big as the Devil's Anus. The very first mutant vs. one of oldest cosmic forces ever, that should be a no-brainer, but, considering that Thawne is working with Apocalypse, they would be prepared for most of the heroes and Thawne would have the appropriate measures to either contain or take Phoenix Force out of the fight and in comic books, Tony created a device that did shatter the Phoenix into fragments of power, splitting it in between five hosts and Mister Sinister was obsessed with Cyclops and Jean and on one occasion, he managed to temporarily harness the Phoenix Force into Jean's clones before its hosts reclaimed it and destroyed the clones, plus, I didn't want to make this too easy for the heroes or too complicated either. If not for Strange, Constantine, Zatanna, Xavier and Cyclops intervening, it's likely that Jean would take Apocalypse down but most likely took the world with him too and the fight ended with Phoenix being banished deep into the space. BTW, I'm imagining Smallville's Zatanna, Serinda Swan in this story.
Also, I can see Apocalypse being arrogant enough to try to master the Phoenix Force, but you see how that turned out, though it's not over yet, but he is weakened now, and as Strange said, "We're in the endgame now."
So, what do you guys think?
Please review and let me know if you have been enjoying this and want for me to continue.
