Disclaimer: none of the characters used here are mine. Inspired by the unfinished fan film "Batman: Dismal Future"

Note: contains characters from works other than Batman and Robocop as well.

Crystal Lake, New Jersey. September 2015:

A bat-shaped vessel hums over a deeply forested area. Inside its cockpit, a cowled man is shifting his eyes, as he alternates between looking at his screens, and through his window.
"I still think you should call the rest of the League on this," a voice talks into his ear.
The pilot suppresses a sigh. "I already told you how I feel about involving them."
"All right, so you found another reason not to like them," the voice replies. "But you could still call some of our friends in New York. They are closer."
"Our target has a knack for avoiding large crowds, Oracle," is his reply. "Counter-intuitive as it may sound, the smaller the group, the better our odds of finding him."
"What makes you so sure?" he can hear the woman, Oracle, ask.
"Because an entire search party couldn't find him in 1957, when he first disappeared."
"OK, but here's what I don't get," Oracle's motherly instinct seems to kick in. "If this boy disappeared in the '50s, how come none of the other Batmen have ever found him?"
The pilot does not waste a second to reply. "If you cross-reference the newspapers of the time, you'll find that my predecessors have been a little preoccupied."
He hears the tapping of keys on a keyboard, as though Oracle is doing exactly as he suggested she should.
This ends at the same time as he can hear her heave a sigh. "I see. The Keene Act is why you waited this long to become Batman. And your father for a time thought he was Starman. And... is that the Green Hornet?"
The pilot, Batman, realizes Oracle must be looking at a picture from the 1960s, showing his foster brother fighting the aforementioned Hornet.
"Wait, so he met the Hornet, and yet he's still at large? How is that possible?"
"Things are not as black-and-white as they seem," Batman replies. "Which I suspect was a catalyst in my brother losing his mind, back in '86."
Somehow, the mention of that year makes Oracle gasp.
"So now that you are aware of my family's history," Batman continues, "can you tell me anything new?"
"Nothing that makes sense," Oracle replies. "According to official documents, Jason Voorhees has been put in cryogenic stasis since 2010. So how could he possibly have anything to do with recent disappearances?"
"Official documents also mention Jeffrey Dahmer died of a head trauma," Batman responds.
A long pause follows, before Oracle reacts. "Well, didn't he?"
"Hack into the California cryo-prison, and judge for yourself," is all the advice he can give.

While the plane is finding its way over the forest, a ground-based vehicle is rolling on the road across woods.
A blue car, with red and white lights, which are currently turned off. Its driver is a man, who looks like he is wearing a metal- and kevlar-based exoskeleton.
As he looks out the windshield, his helmet's visor is scanning the area for any movement.
"Find anything yet, Alex?" a picture of a young blonde woman pops up into his heads-up display.
"Aside from some small animals, no," he answers.
"Are you sure it's supposed to be around here?" she asks.
"These are the coordinates Raiden gave us," he answers.
"Could he have lied to us?"
"There's always that possibility," he does not deny that.
"I just found out," the woman starts, "S.H.I.E.L.D. detected an odd energy reading around here. Which confirms Raiden's story."
"So he wasn't lying," his tone almost sounds like he is disappointed.
"Why is Raiden so adamant about finding this one, anyway?" she wonders. "I mean, he's not the only one who fought in their tournaments."
"Apparently, this one spent too much time in the Netherrealm. He may have absorbed something he shouldn't have."
"So they send you to go after him," she understands now."
"With what I have read about this region," he suddenly brings up, "I still think it's odd that the B.P.R.D. never interfered."
A brief pause from the woman in his HUD, before she talks. "They have, actually. They took care of him in 1993. They must have assumed their job was done, so they never came back here."
"Sounds likely, Diana," he agrees. "Can any of the allies we made in the other Realms help?"
"Cassie Cage is in Newt, Texas," Diana explains, "Briggs is visiting Cheyenne Mountain, Colorado, and..."
"Never mind," he interrupts her.
"I can always call in the Troop," she suggests.
"No minors!"
Diana's expression shifts to a more somber one. "Sorry I brought it up."
He does not reply, but the way he leans back into his seat, indicates he is relaxing, thus not angry with her.
"Speaking of minors..." Diana says, but is interrupted before she can say anything;
"We are part of an inter-agency task-force. We don't have time for children."
"Actually, that's exactly why we should be talking about that," Diana says. "U.N.I.T.'s and Kronika's upgrades may have made us more powerful, but we're still not immortal."
"And just how do you propose we produce one?"
"That should be simple," Diana explains. "They just have to extract a sample of our DNA from our brains. And if the merging of OCP and Madacorp goes through, we can use some of the latter's technologies to grow a child."
"That plan still hinges on us having to tr..."
A bright light to his right hand side interrupts his sentence.
The car brakes in the middle of the road. The door opens, and the driver steps out. Metallic whirring can be heard with every move he makes, gears can be heard spinning as he turns his head.
"What was that light?" Diana asks.
"I don't know."
As he answers, he can hear something moving above him. He looks up, and sees a black shape eclipsing the stars as it flies over them.
"But I don't think we're the only ones who saw it."
"Sounds like a job for Robocop, Alex?"
As cheesy as that question was, the robotic man, Robocop, cannot help but grin.

He shuts the door to his car, and walks toward the source of the light.
Robocop lowers his right hand to his leg, which opens up to expose his gun. He grabs hold of the gun, takes it out, upon which his leg shuts again.
Walking into the woods, his HUD switches on the thermal scanner.
"I really wish I could be there with you, Alex."
"You wouldn't be able to do much if you were," Robocop reminds her.
"Maybe these U.N.I.T. people should hook my brain up to a DV-5," Diana suggests.
This confuses him. "What's a DV-5?"
"Something that US Robots and Mechanical Men has been working on," Diana explains. "A central computer that controls six robot bodies."
"Maybe you should have worked for them," Robocop suggests. "Instead of OCP."
"If I worked for them, I wouldn't be talking with you now," Diana reminds him.
Robocop would smile, if his HUD hadn't picked up something peculiar.
"Odd," he says. "Why would this spot be colder than its environment?"
"It's too early for winter," Diana remarks.
Robocop moves in closer, while switching to night vision.
Moving past the trees, he sees a car, which has its mechanical parts attached to its bodywork, rather than inside the car.
Robocop scans the people inside. There is only one man, with long white hair, and a white radiation suit. Scan reveals that his forehead is cut.
"Looks like a concussion," Robocop informs Diana."
"The nearest hospital is hours away," Diana lets him know.
"We better not waste time, then."
With that said, he looks at the car's nose. It seems to have collided with what at first glance looks like a phone booth, which has the words "Police Public Call Box" printed at the top.
Robocop tries to make sense of this. "A car collided with a phone booth. But there's no road here, so how did it end up here? And the booth is too far away from the road, so it makes no sense that it would be here."
"That's not the half of it," Diana tells him. "U.N.I.T. files are full of pictures of this booth."
"Are you saying that U.N.I.T. knows more than they're letting on?"
"Alex, don't be paranoid now," Diana warns him.
A loud thud can be heard. Robocop turns his head to his left, and tilts it up.
Atop the booth, a dark figure is crouching, wearing a black suit, black cape and cowl, the latter of which have two spikes on top. His appearance resembles that of the masked vigilante, known as Batman.
"Aren't you outside your jurisdiction, officer?" Batman asks him.
Robocop points his gun at him. "You are in no position to question me."
"Not even if you don't want me to report you to the T.E.C?" Batman questions.
Behind his visor, Robocop frowns. "T.E.C?"
"This DeLorean car was confiscated years ago," Batman elaborates. "It shouldn't be here."
"Neither should this booth," Robocop says. "And yet both are here."
Hearing him, Batman realizes he is just as much in the dark as he is. He jumps off the booth, and touches down.
"It appears that Crystal Lake has more mysteries than I thought," Batman remarks.
Hearing something, Robocop turns his head to the booth. "My audio sensors are detecting movement inside."
Batman turns to the door himself. His own batvision does not reveal anything inside.
Before he can think of an answer, the door opens, revealing two men in white armor, carrying guns.
Instinctively, Batman dives into the shadows, while Robocop points his gun at them.
"Identify yourselves," he orders.
As a response, the armored men fire their guns. Rather than bullets, rays of light fire from the guns.
Usually, when people shoot him, bullets bounce off his armored body. But these are not bullets. The rays heat up his metallic exoskeleton, making his body heat up, close to dangerous levels. He fires his gun at the two guards.
Both of them fall, but only to reveal others behind them.
A black object flies past the two soldiers, slicing through their guns.
The two armored men turn to their right, where they can see Batman.
With their attention now on the vigilante, Robocop can find himself a place for cover.
But even with these men focusing on Batman, others don't forget there is a robotic one as well.
With the sudden over-abundance of people, Batman points his cable-gun to the nearest tree top, shoots, and reels himself up.
One of the soldiers, realizing what the masked man is doing, raises his sidearm, and shoots the tree top.
No longer having a hold, Batman falls to the ground.
Robocop keeps firing at the soldiers, but cannot help but notice an inconsistency. Counting the men he has shot, over a dozen people are leaving the phone booth. How do they all fit inside?
The soldiers move in on the now motionless man.
Upon poking him with their guns, Batman rolls around, taking their guns out of their hands, and punching their faces with them.
With them out of the way, he notices some soldiers approaching Robocop. He shoots his cable-gun, which catches one of the soldiers, whom he pulls back, and punches out cold.
Noticing how Batman is helping him, Robocop can now shoot his way through the soldiers.
"Drop your weapons!"
Both of them look around, realizing only now how the soldiers have managed to surround them, and have their guns aimed at them.
"If you are lucky, our boss will spare your lives," one of the soldiers says.
A loud slash, followed by a high-pitched cry of agony, sounds through the woods.
Everyone turns to look, and sees how a red line has appeared across the chest of one of the soldiers, with a blade protruding from one end of the line.
The blade sinks back into the chest, and the soldier falls down, revealing a larger body, wearing tattered clothes, and a battle-scarred hockey mask, heaving his shoulders as he breaths heavily.
Batman looks at the large man, who seems to fit the description of the man he was looking for.
"Jason Voorhees?"
He cannot be sure, but it looks like a spark appears in Jason's eyes.
The soldiers now turn their attention to Jason, and fire at him.
Jason raises his machete, but it receives a blast from the ray-guns, knocking it out of his hand.
Remembering his job to take Voorhees in, Robocop fires at the soldiers again.
Batman drops a smoke pellet, blinding the nearest soldiers, so he can easily take them out.
Since he no longer has his machete at hand, Jason resorts to his bare hands. He grabs two of the soldiers' heads, and smashes them into each other.
Within what seems like seconds, all the white armored soldiers are taken down.
"I'm having... trouble, comprehending what is happening," Robocop remarks.
"You're not the only one," Batman responds, while using his batvision to scan the area.
But try as he may, he cannot find the big guy with the hockey mask.
"It looks like our savior does not show on my scans any more than these soldiers did while inside the police booth," Batman informs his companion.
"How do so many of them fit inside?" Robocop questions.
"And why would a man, who is known for avoiding large crowds, come out to help us?" Batman wonders.
Before either of them can come up with an answer, both arch their backs, as some invisible force grabs them by their necks, forcing them back.
Both of them start struggling against something at their throat area, but neither can feel anything there.
Suddenly, a mechanical inhale can be heard, followed by an equally synthetic exhale.
Looking at the threshold of the police booth, they see a dark man, emerging, while holding up his hands.
"What are you doing to us?" Robocop manages to ask.
A synthesized voice replies. "You primitives know Basic. Excellent."
Batman tries to move in closer, but whatever invisible or intangible force is holding him, is also keeping him on the spot.
The newcomer tilts his head up, and looks to the stars. "These stars. They seem familiar somehow..."
Lowering his head again, he faces his two opponents. "What system is this?"
All Batman and Robocop can do, is exchange a glance. What is this dark man talking about?
Since the two did not answer him, the dark man raises his hands a little higher.
Neither Batman or Robocop can look down, but they can feel how their feet are no longer touching the ground. Is this man lifting them up?
"What system is this?!" the man is more insistent in his questioning.
A swooshing sound rushes between the two men, making impact somewhere, followed by an electric crackling, and a synthetic howl of pain.
At the same time as the howl, both Batman and Robocop are let down.
Rubbing their necks, both of them can see a machete, lodged into the dark man's chest device. The man can now barely stand on his two feet, and his breathing sounds like it is flickering.
In his peripheral vision, Batman can see Jason walking past him.
Looking up, he can see the hockey masked man looking down, still with that spark in his eye.
Is he happy to see Batman? That is not usually the reaction he gets from adults.
But then, from what he has read about Jason Voorhees, he is basically a child trapped in an adult's body. Could it be...?
While he is thinking about this, Jason approaches the dark man.
Standing before him now, he grabs hold of his machete, ready to pull it out of the man's chest.
Suddenly, a red beam shoots its way through Voorhees' back.
Finding their second wind, Batman and Robocop rise up, just when the red beam disappears.
The dark man pushes Voorhees away.
"It will take more than a piece of metal to take me down," his voice never breaks, despite his breathing apparatus being broken.
Robocop points his gun at him. "Surrender now, and you will receive the medical attention you need."
Batman, realizing this man is not the type to accept such help, reaches in his belt for another of his batarangs.
Another thud can be heard from behind the dark man. The latter falls down, revealing an old man, wearing a bandoleer over a battle-torn outfit.
Robocop lowers his gun, and Batman puts his batarang away.
"Thank you," Robocop says.
"Don't thank me yet," the old man says. "I still got to send these people back to where they came from."
"The people in that car need medical attention," Robocop points out.
The old man nods. "Colliding with other ships in the time vortex will do that to you."
Robocop tilts his head to the side. "Time vortex? I don't understand."
"Long story short, he's saying that what happened here must remain a secret," Batman explains. "And we should help keep it that way."
"That is exactly right, my good man," the old man replies.

Having come to this agreement, the three of them carry the bodies of the fallen soldiers inside the police booth, connect the dark man to a different type of breathing machine, and tow the car out of the woods.
But even with all that, Batman cannot help but feel sorry. He came to finish what his predecessors could not start. He wishes he could have done more for Jason.
As soon as the booth has disappeared, Robocop has towed the car away, and Batman has flown off with his plane, crickets can be heard chirruping, as though they too cry over the fall of the man behind the hockey mask.
Suddenly, the critters sense something uncanny about the fallen brute. Like something is heating up inside him. Not wanting to be burned, the nearest critters hurry out, while his body catches fire.
The body starts twitching, as its shape started to change in some spots. Fire burns from his face, blackening his mask.
Having found a new power in his body, Jason rises up, having changed into something that looks like he came directly from hell. The thing that Raiden feared he may have absorbed in the Netherrealm has finally manifested. And Jason has a new hunger for mayhem.