"Back to the Doom Temporal Havoc" Doom x Back to the Future Crossover

Back to the Future x Doom (2016) Time Travel Comedy Action Crossover:

Chapter 1: The Quantum Anomaly

It was an ordinary day in Hill Valley—or at least it should have been. Doc Brown was in the DeLorean, fiddling with a curious new modification to the time circuits. Marty McFly sat beside him, nervously bouncing his knee as he anxiously glanced at the flux capacitor.

"Doc, are you sure this is safe?" Marty asked, his usual easygoing demeanor replaced with hesitation.

"Absolutely! Marty, we've traveled through time in the past, and now, thanks to this new modification, we can harness the power of quantum rifts!" Doc Brown grinned, excitement twinkling in his eyes. "The future of time travel is limitless!"

Suddenly, the DeLorean jolted. Sparks flew from the dashboard, and the time circuits flickered violently.

"What's happening?! Doc?!" Marty shouted.

"Something's... wrong!" Doc gasped. "We're not traveling in time the way we should be—this is something... something different."

With a loud screech, the DeLorean shot through the air, its speed increasing exponentially. Marty clutched his seat as the world outside warped and twisted, crashing through various timelines at breakneck speed.

Finally, everything went dark.

⸻

Chapter 2: The Encounter with the Doom Slayer

When Marty regained consciousness, he was no longer in Hill Valley. Instead, he was in a place that looked like a warzone. The ground was cracked, charred, and the sky was filled with an eerie red glow. The DeLorean had crashed into a rubble-strewn building, and when Marty stepped out, he noticed something that made his heart race: a massive demonic creature was advancing toward them.

"Marty, I think we're in a bit of a situation here," Doc muttered, peering out of the DeLorean door.

Before Marty could respond, a massive figure stepped into view—a towering, armored man, wielding a massive shotgun and an energy sword. The Doom Slayer.

"Whoa, Doc! Who's that?!" Marty asked.

Doc's eyes widened. "That's... that's the Doom Slayer. One of the most legendary figures in the multiverse. He's fought demons across countless worlds!"

The Doom Slayer did not hesitate. He launched himself toward the demonic creature, firing his shotgun with brutal precision. Within seconds, the demon was obliterated, its monstrous body disintegrating into smoke.

The Doom Slayer glanced over his shoulder at Marty and Doc, his face hidden beneath a helmet of gleaming steel.

"You... are not from here," the Doom Slayer spoke, his voice low and rumbling through the air.

"Uh... yeah," Marty stammered, "we kind of got thrown through time and space, and—"

Before Marty could finish, the sound of heavy footsteps echoed in the distance. Another threat appeared, but this one was far worse.

It was Olivia Pierce, the UAC scientist, possessed by the Spider Mastermind.

"You shouldn't be here," Olivia hissed, her voice twisted and alien. She lifted her hands, the air around them shimmering with dangerous energy. "I've been waiting for you."

The Doom Slayer stepped forward, tightening his grip on his weapons.

"Doc!" Marty yelled. "Isn't she the one who started all this madness?"

"That's Olivia Pierce, and yes, she's the scientist who opened the portals to Hell. But now it looks like... she's being controlled by something far worse."