And now we have one last battle as our team of heroes race back to the future.

Enjoy!

Clocktower:

Doc had a lot on his hands, aside from keeping the DeLorean discovered by the town residents. Heartless soldiers seemed to have tried to tamper with the experiment to send Marty, Sora, and Co. back to 1985. Luckily, Doc had his gun by his side.

"Get away from the wires!" he shouted to one near the lampposts and shot it.

Then one jumped on his shoulder. "Argh! Get off! I'll never submit to the darkness!" he growled, hitting the Heartless in the head with the butt of his gun, destroying it.

He then looked up to see a knight-looking Heartless near the pole to attract the lightning. "YOU! GET DOWN FROM THERE!" he shouted, shooting the Heartless, which fell onto the clock tower's stairs, disappearing. "Bullseye!" exclaimed Doc, triumphantly.

The Heartless were soon gone. Doc put the gun back in his toolbox as the storm began to loom in.

Doc checked his watch on his left arm. "Damn! Where are those kids?" he muttered. He walked around and checked his pocket watch. "Damn!" He walked around again and checked his right arm. "Damn damn!"

Just then, Sora arrived with Goofy and Riku on his glider, and Mickey pulled up with Donald and Kairi on his. They hopped off towards the Doc.

"There you guys are!" exclaimed the Doc.

"We heard gunshots and I sensed the darkness." said Riku.

"Gosh, is everything alright?" asked a worried Mickey.

"Just a few Heartless pests, but nothing I couldn't handle." replied Doc, waving it off. He then realized they were one hero short. "Great Scott! Where's Marty?" he asked.

Before anyone could reply, Doc's car pulled up, and Marty came out quickly, out of his suit and back in his shirts, jacket, life-vest jacket, jeans, suspenders, socks, watch, and sneakers.

"You're all late, do none of you have any concept of time?" Doc asked, frantic and annoyed.

"Hey c'mon, I had to change, you think I'm going back in that zoot suit?" Marty asked.

"Plus, most of his clothes and that watch don't belong in the 50's." added Sora.

"The old man really came through, it worked!" Marty added excitedly.

"It's true, George came through and knocked out Biff in one punch… before we had to deal with his Heartless… luckily he's ok, but won't be hurting anyone for a while." added Mickey as Marty showed Doc the picture.

"I never knew he had it in him. He never stood up to Biff in his life!" exclaimed Marty.

"Never?!" asked Doc, a little concerned, handing Marty back his picture.

"Is something wrong?" asked Riku.

"Uh, no, nothing at all." replied Doc as they walked over to the DeLorean. "Alright, all of Marty's stuff and my 1985 counterpart's stuff are in the car, electric pole is hanging on the side," he looked up at the sky. "and the weather's on schedule." remarked Doc. He then grabbed a clock. "Alright, let's set your destination time. This is the exact time you left. I'm gonna send you back at exactly the same time. It's be like you never left. Now, I painted a white line on the street way over there, that's where you start from. I've calculated the distance and wind resistance fresh to active from the moment the lightning strikes, at exactly 15 minutes and 22 seconds. When this alarm goes off you hit the gas." he told them, setting the clock near the dashboard and closing the door.

"Sounds simple enough." remarked Kairi.

Everyone laughed at that remark.

"It's hard to believe it'll be 30 years before I see you all again." sighed Doc.

"We will have a lot to talk about after spending a week in 1955." agreed Riku.

"Guess so." replied Doc.

"I hope this all works." Donald said, eying the storm.

"Don't worry. As long as you hit that wire with the connecting hook at precisely 88 miles per hour, the instance the lightning strikes the tower, everything will be fine." Doc said.

Suddenly, while others were about to get into the car, Doc reached into his jacket pocket… and pulled out their letter to him. "What is the meaning of this?!" he asked Marty, Sora, and Co.

Sora, Riku, Kairi, Mickey, Donald, and Goofy gasped when they realized Doc had the letter.

"You'll find out in 30 years." was all Marty could say.

"It's information about the future, isn't it!?" exclaimed Doc, frantically.

"Doc wait!" cried Sora as he and others ran towards him on the other side of the time machine.

"I told you! The consequences could endanger us!" cried Doc.

"Doc please!" cried Goofy

"You have to trust us!" pleaded Donald.

"It could damage our future! King Mickey, how could you let this happen?! You know the order is against meddling! You told me yourself! You all could be in serious trouble for telling someone their future in this world!" exclaimed Doc.

Mickey knew Doc was right, but even as a king, he didn't care this time. "Doc, I'm really sorry, but it's a risk you're gonna have to take! Your LIFE depends on it" said Mickey, trying hard not to cry as well as the rest of the heroes.

"NO! I refuse to accept the responsibilities!" cried Doc, tearing up the letter, much to the other seven's horror.

"Doc, NO!" cried Kairi.

"Then I guess we'll just have to tell you!" cried Sora.

But before anyone could tell Doc his fate, Goofy gasped and pointed farther down the street near the clock tower.

"Fellers, look!" the dog cried.

The others turned to see… a member of Organization XIII!

"Great Scott! Who is that?!" asked Doc, unwittingly putting the torn letter pieces into his jacket pocket.

"Organization XIII!" cried Mickey.

The member leaped forward, and stopped 3 feet in front of the eight. It then snapped its fingers, and suddenly a tree branch fell onto the chords connected from the wire across the lampposts to the rod on the tower, disconnecting them!

"Great Scott! He disconnected the wires!" cried Doc.

The member then removed his hood to reveal a familiar man with long grey spikey hair.

Sora, Riku, Kairi, Mickey, Donald, and Goofy gasped in horror as they knew the man all too well.

"Xemnas!" exclaimed Sora.

"Xemnas? As in the leader of the old organization and a current one in Master Xehanort's?" asked Marty.

"The very same." growled Riku as he and the other travelers glared at Xehanort's Nobody.

"Nice of you to remember me." sneered Xemnas, sarcastically. He then grinned evilly, making Donald, Goofy, Marty, and Doc feel uneasy. "I also see you lot have been meddling with this world's order." he added.

"What gives you that idea?!" growled Goofy.

Xemnas chuckled. "You're truly as dumb as you are ignorant. You revealed the idea of other worlds to Marty McFly and Dr. Brown, you unwittingly let the boy interfere with his parent's first meeting, and right now, you're warning the crazy scientist of his fate." he replied.

"I'd hardly call that meddling. They got the parents back together." scoffed Doc.

Xemnas' grin darkened. "Even so, they revealed the secret of world-traveling. They aren't even fit to return home, or to their worlds."

"Who cares?! We trust Marty and Doc, and they trust us!" protested Sora.

"Besides, they swore to the secrecy of helping protect the order. Unlike you and the other bad guys." added Riku, glaring.

"Why are you even here, you monster?" demanded Kairi.

"Maleficent's little lackey Pete informed us about your status in this world." Xemnas replied.

Flashback:

In the Castle That Never Was, Ansem, Xemnas, Young Xehanort, Xigbar, Larxene, and Vanitas were sitting on their respective thrones. They all wore their jackets and vanitas had donned his mask.

A corridor of darkness opened in front of Master Xehanort's throne as Pete emerged from it.

"Well look what the cat dragged in. Himself." smirked Larxene.

"Maleficent's cat sidekick." Xigbar chuckled.

"Uh yeah! It's me!" Pete said with a nervous grin.

"What do you want Pete?" Young Xehanort asked in exasperation.

"Uh well, I wanted to let you know Sora and his pals fixed the timeline!" said Pete.

"They did huh? Never thought idiots like them could fix something so fragile like that." Vanitas snarked, leaning back on his throne.

"Yeah! And they're heading back to the clocktower to meet up with Ol' Doc Brown." Pete added. "Maleficent wants one of you guys to go stop them before they get back to 1985!"

"Hmm. Seems as though the Heartless Biff Tannen has failed to dispose of them." mused Ansem.

"In that case, I will go myself." said Xemnas. "I will see to it none of them return to the right point of time in Hill Valley's timeline."

"Sure you don't want any back up?" Xigbar asked. "We can help boost your chances y'know."

"I will be fine Xigbar. Besides…" Xemnas replied as his face went dark. "This is personal to me…"

And Xemnas teleported away.

"Think he can pull it off?" Larxene asked.

"Xemnas is pretty powerful." Vanitas replied. "And a lot of us will be too once Master Xehanort new idea for your new weapons comes to pass."

"So uh… do you need me to do anything else?" asked Pete.

"You're dismissed. Begone." said Young Xehanort, opening a corridor of darkness. Pete quickly scurried through it.

Hill Valley:

Xemnas walked towards the group, the world-travelers holding their ground as Marty and Doc stiffened a bit.

"Your efforts to save this world are all for naught. Yes… you fixed the timeline… but that doesn't mean we will allow you to return back. I and my fellow superiors cannot allow you to interfere with our plans we have during and after the Keyblade War." Xemnas then shot a glare at those not from Hill Valley. "We're also not amused by your stunt from a previous night. Especially me…"

"Stunt? What stunt?" Donald quacked in confusion.

Xemnas' glare darkened. "I am referring to you making a mockery of us all."

The eight heroes blinked in confusion, trading glances.

Xemnas' scowl didn't change. "You honestly don't remember? How quaint. I mean when you were in the home of George McFly." he hissed. "Donning the cloaks we wear in representation of our Organization, a serious group when it comes to our goals. I formed it to form such a power that is Kingdom Hearts, in order to fulfill the 13 Darknesses needed for the Keyblade War. And Master Xehanort's entire plan to accomplish it. And yet you made a mockery out of us donning them as disguises. Darth Vader and the Organization from Planet Vulcan indeed. Pathetic. Neither of us in charge of the new and improved Organization XIII are amused in the slightest."

The group now understood.

"Hmph. No wonder you're extra cranky." Riku sniffed.

"Would… you believe that it was just a joke?" Goofy nervously asked.

"I don't joke, you impudent mutt." Xemnas growled. "Just like how I'm not joking about this. None of you are leaving this courthouse or even this timeline alive…"

"Not gonna happen." Marty disagreed. "These guys are some of the greatest friends I know. They helped me get my parents together to save me, Dave, and Linda. They know how to fight those Heartless things well. They have every right to go back to the future with me so they can protect the other worlds from the likes of YOU!"

Xemnas only smirked. "Such a bold disagreement. Too bad it'll be your last."

"Oh, I wasn't trying to just argue." replied Marty. Xemnas raised an eyebrow in confusion. "I was also causing a distraction." Marty added, smirking.

Before Xemnas could reply, out of nowhere, Doc suddenly punched him in the face, sending the Nobody to the ground, grabbing his face.

"Nice job Doc!" cried Kairi.

"Thank you!" Doc said as he grabbed the cables. "Now get that man out of here, and then get the DeLorean in position!" he called as he ran inside the clock tower.

"With pleasure!" replied Sora, summoning Kingdom Key.

Riku then summoned Way to Dawn, Mickey summoned Star Seeker, Kairi summoned Destiny's Embrace, Goofy summoned his shield, and Donald summoned his staff, then summoned Marty's skateboard, and tossed it to the teen. Mickey then summoned Kingdom Key D, said the spell, and tossed it to Marty, who caught it and held it tight.

Xemnas floated to the center in front of the clock tower. The heroes ran up to face him, weapons ready, just as a magical barrier surrounded the eight in the grassy area, separating them from Doc, the tower, and the DeLorean.

"You will never defeat me." snarled Xemnas, summoning his Ethereal Blades.

"Holy crap those look like lightsabers!" exclaimed Marty.

"Don't let them scare you, just focus on fighting!" said Sora.

"And surviving!" added Donald.

(Xemnas Final Battle from Kingdom Hearts II plays)

Mission: Defeat Xemnas before time runs out to get back to the time machine.

Party Members:
Sora

Donald Duck

Goofy

Riku

King Mickey

Kairi

Marty

"See my heart's power... Feel it... Know it... Accept it!" Xemnas shouted.

The battle commenced as everyone raced across the clocktower courtyard.

Xemnas sent several blades raining down on the group as they all ducked and jumped out of the way. Sora got up and fired a Double Firaga spell against Xemnas, only causing minimal damage since he blocked it. Xemnas raised his blade and attempted to slash Sora, but they locked weapons and clashed several more timed before Xemnas slashed Sora across his chest as he faltered back. Kairi ran up at Xemnas using a Double Blizzaga spell against him. Xemnas was barley effected as he sent more blades at Kairi as she tried to quickly block them with her Keyblade, though was struck a few times. Donald and Goofy attacked from either side. Donald casted Double Thundaga spells and Goofy tossed his shield against Xemnas. Xemnas deflected the spell and shield at the same time with his blades and attacked them both at a fast pace, slashing Donald and Goofy with his blades as they fell over in pain. Riku attacked Xemnas head on with a Dark Firaga spell, managing to get some hits before Xemnas used his Spark Wall to block the attacks. He then dismissed the walls and used his Dual Blade method to attack Riku, slashing him several times as he fell back. Mickey jumped at Xemnas and spun around, slashing him a few times with his Keyblade. Marty skateboarded behind Xemnas and bashed him several times with Kingdom Key D against him. Xemnas slashed Marty across his chest and he fell off his skateboard. Xemnas then used his powers to envelop Mickey with the power of nothingness and sent him flying back against the ground.

"Is that all...? Is that the breadth of your hearts?" Xemnas taunted.

Donald casted Curaga on everyone as they got up and charged back at Xemnas.

"Light!" Sora yelled as he casted a light spell at him.

Xemnas reflected it, but Riku used this distraction to unleash an Exo Spark to electrocute Xemnas. Xemnas growled as he sent a wave of blades flying at the silverhead. Riku, backflipped away and landed on his feet, knocking the blades away with his Keyblade. Marty skateboarded away from any more ethereal blades Xemnas was sending at him, swinging Mickey's Keyblade like a baseball bat before jumping off and managing to nail Xemnas in the head. Enraged, Xemnas sent several blades at Marty, knocking him over. But Mickey attacked him at that moment, casting a Triple Pursuit spell against him, making him fall back. Goofy then jumped up and performed his Goofy Tornado against Xehanort's Nobody, bashing him multiple times before Superior of the In-Between sent him flying down into the grass with his ethereal blades. He and Kairi then locked weapons, trying to thrash each other before Kairi managed to cast an Icicle Mine spell against him. Donald jumped into the air at Xemnas and then casted Raging Storm against him. Xemnas summoned more power to unleash his Spark Bomb technique, sending out four sphere lights that exploded, sending everyone in all directions.

"Jesus this guy is powerful!" Marty winced, trying to get up.

"We can't give up! We gotta keep going!" said Kairi, standing up.

"Kairi's right! If we give up, we won't get you back to your time and save this world!" said Sora.

Xemnas just cackled. "You are already too late." he said. He began to conjure up more power of nothingness.

Xemnas tried to unleash it on the group but they all ran across the courtyard to avoid getting struck. Sora fired Firaga spells at Xemnas and then unleashed a Flame Fall spell to stun him. Xemnas fired more ethereal blades, but Kairi jumped up and slashed him multiple times before she casted Blizzaga Pursuit on him. Xemnas sent a rain of ethereal blades down again as Donald bashed them away with his staff and blasted Xemnas with a Wind Tracer spell. Xemnas sent more Ethereal Blades down, striking down Sora, Kairi, and Donald. But Marty used this chance to skateboard up behind Xemnas and strike him in the back several times with his temporary Keyblade. Xemnas turned around to strike him, but Marty ducked, stepped on his skateboard as it flew into his hands and he bashed it against Xemnas' face, getting an angry snarl from him before Marty also socked him in the face before he quickly skateboarded away. Xemnas summoned more nothingness power to attack Marty, but Goofy performed his Goofy bash move, throwing his shield under his leg as it struck Xemnas in the head. The old Organization's Number 1 scowled as he sent more ethereal blades towards Goofy, striking him several times. Goofy fell down as he gave his signature holler. Riku fired a Mega Flare spell to immobilize Xemnas before Mickey casted Transcendence to further bring Xemnas down.

Xemnas landed on the ground, snarling in rage. Swirls of nothingness surrounded him as he unleashed a barrage of ethereal blades, nearly striking the 7 heroes at every turn.

"Holy cow!" exclaimed Mickey.

"Now how do we beat him?!" cried Kairi.

Marty turned to Sora. "Think it's time to use your best form yet!"

Sora nodded. He joined hands with Donald and Goofy and then in a flash of light, he appeared in his white Final Form with the two toons gone. He was also floating, hair and glowing white clothes flowing in the wind, with the Keyblades Oathkeeper and Oblivion floating behind him.

"This is it!" Sora shouted.

Xemnas sent his blades flying towards Sora, but he quickly dodged it with ease. Sora then performed Final Strike, slashing Xemnas many times with Oathkeeper and Oblivion. He then performed Crime & Punishment, unleashing powerful Fire spells at the Nobody. Finally, Sora performed his Final Arcana attack, combining both Keyblades and threw them at Xemnas, striking him. He then separated the Keyblades when they returned to him and unleashed a burst of energy against Xemnas, ending the battle.

(Xemnas Final Battle from Kingdom Hearts II ends)

Sora soon landed, Keyblades disappearing, Donald and Goofy reappearing, yet still in Final Form, clothes not glowing.

Xemnas slowly got up. He glanced up at the seven heroes who glared at him. "You've won this round, but mark my words, you WILL perish when you least expect it." he said, darkly. "Keep on going down this path, and you will never see the Keyblade War and the fate of all the worlds."

And he disappeared through a Corridor of Darkness. Donald and Kairi casted Curaga on everyone.

"Nice work everyone!" congratulated Mickey as he and the others dismissed their weapons.

"That's totally my favorite form!" complimented Marty.

"Mine too, makes you look tough." giggled Kairi.

Sora blushed as he rubbed the back of his head. "Thanks guys." he replied.

Suddenly, the barrier disappeared and the others looked at the clock tower, and gasped. There in front of the clock, was Doc standing on the thin ledge.

"Doc!" cried Marty as he and the others ran towards the tower.

"Doc, we have to tell you about the future!" called Sora.

"What?!" called Doc as he struggled to get across.

"He said that we have to tell you about the future!" answered Riku.

"On the night we go back, YOU ARE…!" began Mickey, only to be interrupted by a boom of thunder.

Doc noticed that the wind was getting stronger and called below, "Everyone! The time machine! You've only got 5 minutes!"

Realizing they didn't have enough time to warn him, Sora, Riku, Kairi, Mickey, Donald, Goofy, and Marty ran to the DeLorean. Marty sat in the driver's seat, Donald and Mickey in the front passenger seat, and Riku, Sora, Kairi, and Goofy in the back.

They soon drove to the starting point, getting the DeLorean in position. Marty, Riku, and Goofy stepped out to get the electric hook into place. Once that was done, they got back inside.

"Poll is set." Riku told them.

"That's good. Now we wait for the clock." said Kairi.

But Marty wasn't satisfied. "Darn it Doc, why did you have to rip up that letter?" he groaned.

"Oh, he's too stubborn." said Goofy. "Gawrsh, if only we had more time."

"Hey! We got all the time we want! We're in a time machine for crying out loud!" exclaimed Sora.

"Yeah, we'll just go back earlier before we left to warn Doc about the Libyans!" agreed Mickey.

"Alright, about 10 minutes oughta do it." said Marty, changing the destination time from 1:35 a.m. to 1:24 a.m. "Time-circuits on, flux-capacitor fluxing, engine running, alright."

He started the engine, but it wouldn't rev properly.

"No… no, no, no, not now!" exclaimed Marty, frantically turning the keys.

"Oh no!" gasped Kairi.

"It's stuck!" exclaimed Goofy.

"Not good." muttered Riku.

Meanwhile up on the tower, Doc managed to make his way across the clock and desperately tried to reconnect the chords. He was about to bring them together, only to discover the one he brought up with him wouldn't go further do to the branch Xemnas caused to fall on top of it.

Doc pulled with all his might, until he disconnected the chord from the one attached to the first lamppost below.

"Argh!" gasped Doc in realization. He then got an idea as he proceeded to plug the cord he brought with him into the one attached to the pole.

Back at the starting point below, Marty continued to struggle getting the engine working, just as the clock went off, signaling it was time to go.

"No, no no no no, c'mon c'mon. C'mon c'mon, here we go, this time. Please, please, c'mon." Marty cried, bashing the hood.

THAT sprung the engine to life.

"YES!" Sora cheered. Riku, Kairi, and the toons did as well. "Floor it!"

Marty hit the gas pedal, and the DeLorean sped away.

Back on the clock tower, Doc proceeded with his plan by attaching a wire rope around the big arm on the clock, and slid down it towards the ground. He let go at three feet, and landed in a leaf pile. Quickly, he removed the tree branch, and quickly connected it to the cord attached around the lamppost. He looked ahead to see the time machine getting closer.

Marty pushed the throttle further and then it reached 88 miles per hour, just as the clock struck 10:04, lightning struck the clock tower, sending the electricity through the wires. Doc jumped backwards to avoid electrocution and watched as the electricity ran along the pole, into the hook as the DeLorean came into contact with it, generating enough power, and sending it along with Marty, Sora, Riku, Kairi, Mickey, Donald, and Goofy back to 1985, as it disappeared leaving a fire trail behind.

Doc got up and starred in awe at what just happened. He walked around the street as the fire trail disappeared.

"YEEEEEEESSSS!" he shouted triumphantly. He had done it. Marty, Sora, Riku, Kairi, Mickey, Donald, and Goofy had been sent back to the future. The Space Time Continuum was saved.

To be continued…

Special dialogue thanks to jdimock.

I'll see you all in the final chapter, concluding this extended remake/Director's Cut!