Disclaimer: I do not own the trademarks to any characters and story elements presented in this story, they all belong to their respective owners, Disney and Warner Bros. I own nothing except the plot of the story.

Chapter 1

Batman had been in his Batcave, reviewing footage of one of Wonder Woman's recent fights against Cheetah, trying to find any weakness in the Amazon, for his contingency plans, when one of the alarms went off. He ran over to check what it was, and the screen announced that it had detected Speed Force residue. Batman thought it was the return of the Reverse Flash, and he quickly readied himself for a battle against him, and prepared to call on the Justice League. When he checked the location, however, it read as the speedster being on the Watchtower. The Reverse Flash may have been powerful enough to do many things, but flight and survival in space was not one of them. A new theory was forming in his head.

Batman quickly activated his teleporter, which promptly brought him to the Watchtower, stationed above the Earth. He ran towards the bridge, and as he did, people started appearing out of thin air. He looked at them carefully, and studied them. They seemed to be wearing European clothing, but nothing like today. Something more similar to what you would see 200 years ago, give or take. Batman's mind started piecing together the pieces, being the world's greatest detective. For some unknown reason, Barry Allen was evacuating people from the past into the future. The question was why.

"Batman to Justice League members. The Flash has returned, and with evacuees. Prepare the watchtower for the accommodation of around 400 people," he ordered through the comms.

As Batman waited for the Flash to finish, he started to ponder why he took so long to return. It had been 3 months since Barry Allen's "death", and only 2 months since he was declared alive by Batman himself. What had he been up to? And how long had he been stuck in the past for? For all Batman knew, Barry could have been stuck for years in history. Bruce knew there would be a lot of disagreements between Barry and him over what to do. But for now, he was glad to know his old friend was back.

There was an ensuing eruption of conversation on the bridge, and Batman quickly recognised the language as Norwegian, having an expanded knowledge of almost every language, even extinct ones. However, this dialect of Norwegian was older, as he had presumed from their appearance.

"Computer, analyse dialect of Norwegian being spoken; tell me what year they are from," instructed Batman.

"No need to, Bats. They're from 1843," greeted Barry, attempting to sneak up on him.

"Flash. Nice to see you again," responded Batman, without emotion.

"Jeez, I mustn't have been gone for long if that's my welcome," he grinned.

"You've been gone for 3 months," Batman said without hesitation.

"Huh. Well a lot has changed for me. But what about the League? How is everyone?" Barry asked curiously.

"It's been fine. Nothing we couldn't handle."

Barry didn't know why Batman was acting the way he was. Usually he wasn't this cold. Maybe someone had passed away while he was gone.

Suddenly, Barry saw more people come through the teleporter. He walked over to greet them. After all, they were the Justice League.

"Barry!" they all ran towards him and hugged him.

"Careful, guys, I'm not made out of steel," he choked out, happy to see everyone.

"Where have you been, Barry?" asked Superman, still astonished to see him after what had felt like forever.

"Yeah man, we thought you were never going to come back!" exclaimed Hal Jordan.

"Who are all these people you've brought with you, Barry?" questioned Wonder Woman.

"Oh! I completely forgot! Hold on, I'll be back," Barry said, as he sped off to find someone.

He found Anna where he had left her, alongside her sister, and he quickly started to speak with her.

"Anna, listen, I need to introduce you to a group of people, sort of like me, but, with other superpowers," Barry said nervously.

"Barry, I'm willing to give them a shot, as long as I can be with you," she smiled.

"You know, you may just be the best woman to ever live, in any time," Barry smirked.

He lead Anna to the league, and Batman, who had now joined them in discussing Barry's return.

"Guys, this is Anna, and she's, well, my girlfriend," Barry said, smiling like an idiot as he hugged Anna with one arm.

Batman frowned more than usual, but stayed silent, as the rest of the league congratulated the Flash.

"Wait, what year is everyone here from?" Superman asked.

"1843." The response came from not Barry, but Batman.

"Yeah, what Bats said," Barry said, slightly bothered.

"Barry, do you think you could hook me up with any ladies from her time?" Hal whispered.

Barry rolled his eyes and ignored Hal's question.

"We're going to need you to come with us, Flash, for a full report of your actions in 1843. We don't know anything about your time in the past, and you may have unknowingly caused another Flashpoint, of which you are not aware of," stated Batman.

Barry had no choice but to oblige, as Bruce was right; he had tampered with time, and maybe he had screwed something up, even if everything seemed normal. Then he remembered who had caused most of this.

"Wait! Before I go, I need to show you someone else. Someone who Bats will probably end up dissecting," he joked, knowing that at some point, Bruce would get close to dissection, and probably at least taking blood samples.

Barry went to find Elsa, and he brought her back in an instant. She looked around at the people who were staring at her, and she felt fearful of them.

"This is Anna's sister, Elsa," Barry explained. "She has powers."

At the mention of powers, Batman raised an eyebrow. Now he was suspicious, and was preparing scenarios of what could happen, and how to neutralise her.

"What type of powers?" inquired Wonder Woman.

"Do you mind showing them?" asked Barry, gently.

Reluctantly, Elsa formed a statue of Barry in his Flash suit, making a small sculpture of him, made out of ice. Everyone was amazed, and Hal thought it was a new type of power ring, one which could make ice.

Batman, however, was carefully watching her demonstrate her power. She was another metahuman to add to the ever growing list of them, and he didn't like the fact he had never seen someone like her. She was a wild card to him.

"Listen, she's not trained at all with her powers, but she doesn't mean any harm," Barry said nervously, remembering what happened last time she exposed her powers.

"You're going to need to come with us too, Elsa," Batman said it without a hint of emotion.

"Hold on a moment, Batman, you can't just take her in as if she's one of your criminals," started Superman.

"Yeah, we should at least hear her story," Hal chimed in. Batman grunted, knowing no one else agreed with him. Barry, however, remembered that Elsa and Anna didn't speak English, so he quickly ran to their armory, and grabbed two more earpieces for them. He was back in a flash, and he showed them how they worked. After a short test, Barry motioned Elsa to speak, but she was still scared.

"Come on, Elsa, you're safe here," Anna tried to comfort her.

"Well," she hesitated, "I'm not sure where to begin..."

"Start at the beginning." Superman gave her a warm smile.

As the story went on, Batman understood she had gone through a very dark childhood, one he knew all too well. But this was a far different story than his own. She had let the fear control her, while he had used it to his advantage. She had never known the outside world, while Bruce was thrust into it far too early. However, the fact that she had unwillingly sent out a winter over her kingdom... This alarmed Batman; what if she did the exact same thing right now? On the Watchtower?

Quite obviously, the "eternal winter" was not eternal, as there was no sign of any winter in Norway that had kept going since 1843. He deduced that when she went away from Arendelle, the magic disappeared along with her. He was interested in the location of where this kingdom was, and he reminded himself to ask her during her interrogation. As the story came to the end, to the part where Barry destroyed Arendelle, he quickly interrupted her.

"I know that all of you will help everyone here who need our help," and Barry had an idea. "Why don't we bring everyone to where Arendelle used to be?"

"I don't see why not," said Superman, as he was thinking about it.

"I can even rebuild the kingdom, albeit in a modern way, as I don't know how to build castles," he said sheepishly.

Everyone was confused, except Batman, who was slowly piecing the puzzle together. After some discussion, the League decided they would all visit the location of what was once a kingdom. When they arrived, it looked as if a meteor crashed into the land. There was grass growing, but the crater was very visible. Although the castle had been where the damage was most present, it was clear the coast had been affected as well.

"Did the Reverse Flash do this?" Wonder Woman asked, softly.

"No," said Barry sadly, "It was me."

Everyone looked at the Flash, in shock that he would do such a thing. Why? What could his reasoning be behind this? The Flash teleported them away, back to the Watchtower, before they could do anything, and when they returned, he was standing in front of then with handcuffs. Behind him, the crater was no more, and a modern city had risen, seemingly out of nowhere.

"I didn't want to tell you guys yet. I wanted to build them a home, so they would at least have somewhere to go," he said with regret.

"You did this?" Hal asked in disbelief.

"I'll explain everything.. As of this moment, I resign from the Justice League, and I'm turning myself in," he stated.

"You built this city for the displaced residents from the past?" asked Batman, suspicious.

"Yes, it was Anna's idea to bring everyone to the future."

Batman suddenly thought of the possibility that Anna, being the sister of a metahuman, might also possess powers. He would have to test this theory later.

Everyone had been so happy to see Barry, but now, everyone was feeling a little frightened. If Barry had done this in the past, what would stop him from doing it again? If Belle Reve wasn't able to hold the Reverse Flash as a prisoner, how could the Justice League hold him? Even Superman, the strongest one of them all, was a little worried about Barry's behaviour. He knew that if the Flash and Superman ever fought, he wouldn't come out victorious. He'd lose, due to Barry's speed.

Batman, however, was the most worried of them all. He knew about Flashpoint, and what Barry had done. It seemed to Bruce that Barry based most of his foolish decisions off of his emotions. He saved his mother, causing the timeline to change completely. If Barry ever went rogue...

"Barry Allen, under the basis that you single-handedly destroyed an entire city, you leave us no choice but to bring you in," declared Superman.

"I'll do it willingly," Barry nodded, before speaking again. "May I have a pencil?"

Everyone took one last look at him, before they teleported away, back to Watchtower.

"Barry Allen, you are in this room for committing a crime," Batman said, bluntly. "Can you state said crime in detail? Including the reason behind it?"

"Oh boy. I guess there's nowhere else to begin but from the beginning," Barry figured. "It all started when I was dropped off in the past, by the Reverse Flash..."

"You see," he continued. "You actually might have saved me, Bats. When I first arrived, I was in a forest, and I noticed I had no super speed. I was just a normal human. I guess I had been out for a while, because when I started moving around, I saw a young boy start running away. He was watching me while I was asleep. I quickly caught up to him, even if I couldn't run at the speed of light, but when I did, he spoke something I didn't understand. Of course, you'll know it was Norwegian, being Batman, but at the time, it could have been any language to me. My knowledge of them isn't very big."

"But I remembered that you had installed a bunch of features on my suit after I joined the league. I activated the linguistic program that you made, which let me speak and understand the natives. This was arguably the biggest turning point for me. If I hadn't remembered it, I might have ended up dead."

"Why? Well, when I followed the boy, he led me to a little town, where the villagers were ready to kill me. They had pitchforks and everything. So anyways, I get to talking to one of them, and he was really compassionate, and ended up giving me work and shelter in the town. To this day, I don't know why he did that." Barry chuckled, remembered his old friend.

"After three months of working in the town, some of the women from the village offered to pay a trip for me to Arendelle, where the queen was being crowned. They thought I was a good looking man, and that I would have a chance with a young lass in the kingdom. They only wanted the best for me," Barry said, softly.

"So I accepted the offer, and I went. The first time I met Anna, actually, was when I bumped into her by accident. This was only 3 days ago for me, mind you. And so, what you heard from Elsa herself is accurate. But here's, where things get messy," Barry sighed.

"Once the queen fled, Anna went after her on a horse. As she left, I too was leaving, but to get back "home". She didn't see me in the way, and she hit me over the bridge, and I fell into the water, which was frozen. When I woke up, I was in an infirmary, I think, and I quickly left. I asked her then fiancée about her, and he told me that she had left to search for her sister. Hearing this, I feared the worst, and I tried my luck to find them both. Long story short, I did find Anna, we found Elsa, then she hit Anna's heart with ice magic, and then I brought her to some trolls," he said, excited.

Batman raised an eyebrow at the mention of trolls. He knew magical beings existed, but trolls? It seemed like something out of a fairy tale.

"Yeah, that's what I thought too, but they helped us. They told us the only way to thaw a frozen heart was with true love. Or something along those lines. Anyways, I brought her back to Arendelle, to get her with her fiancée, because he would be able to provide the act of true love, and once I had finished doing so, I fell asleep. I was pretty tired from carrying her, because did I mention she was freezing to death? While I slept, I had this dream, and this was kind of a big deal, because I saw Thawne in it, and he told me I still had my powers, and the only reason I couldn't use them was because he made me believe I had lost them."

"This was pretty game changing, and when I awoke, I had access to my powers. So I went into Arendelle, and searched everywhere. Being 'rusty' with my powers, I forgot to search other frequencies for Thawne and Anna. So when I saw him with her, I panicked. He grabbed her, and stuck his hand through her chest, and..." Barry couldn't finish, he was about to tear up, but composed himself.

"25th century technology," Batman answered, even though Barry hadn't asked a question. "He stole tech from his time before he went to confront you. What you saw was only a hologram, a projection of Anna, which he used to his advantage, in order to trick you."

Barry's eyes lit up with anger. "He tricked me into..."

"Please continue."

Barry sighed. "This is the hard part. Seeing Anna 'die', it really showed me what I would do if I saw someone as important as her to me die. I gathered my strength, and came back, punching Thawne with everything I could give. But he just phased, and my punch went through, and I ended up hitting the wall behind him, with a punch packed with so much power, everything around me disintegrated instantly. I thought I had killed everyone."

"Afterwards, I decided to return to the future, and turn myself in to the league, but before I was done circling the Earth, I saw Thawne, and he led me to a huge crowd of people. Everyone from Arendelle, and the surrounding area. He had saved everyone. When I asked him why, he told me a crisis was coming, and I would play a part in it. Then, he left."

"And you pretty much know the rest. I brought everyone to the Watchtower, showed the League the destruction, and well, here we are," finished Barry.

Batman had gathered much information and still had questions, but he knew better than to press on for more. He dismissed Barry, who returned to his cell, which to be fair, was more like an apartment.

Everything Batman had just heard changed everything. A crisis? One where the Flash would play a part in it? It seemed there was a looming threat, just beyond the horizon. He would need to ask more questions, but that would have to wait until tomorrow. He would give Barry time to rest. Now would be Elsa's turn.

"State your name for the record please," Batman requested.

"Um, Elsa," she responded, almost timidly.

"You do not have to worry about us harming, you, we only want to help you."

"Why am I here?" she asked.

"We need to assess your situation. You possess great power, but if left unchecked, it could spell disaster that we cannot deal with at the moment," Batman explained.

"So what do you need from me?"

"Your story," he replied.

So she told her story, again, but as she did, she felt as if this man was colder than anything she had ever felt before. He seemed so stoic, so devoid of life. His eyes were sockets of white light. Perhaps he really was a vampire.

Her story was much more interesting than Barry's, and Batman now realised that she was indeed a threat, and not a light one. He couldn't show any of his intentions to her, but he had a general idea forming in his head.

"My queen, if you would wait here for a moment, I need to discuss something with someone," he carefully said.

Batman exited the room, leaving Elsa alone. He turned the corner, and activated his comms.

"Batman to Founding Justice League members. Come to the meeting hall, we have much to discuss about the queen," he ordered, as he entered the room.

"I've gathered you all here to discuss the problem of the population living in the Watchtower, and their queen," he began. "We have to address them."

"And how do you intend to do that?" asked Superman.

"Simple. We're going to use the city the Flash constructed in the ruins of the old Arendelle," he stated.

"Do you think it's safe?" questioned Wonder Woman.

"Barry has no motives to do anything bad, there should be nothing wrong with the infrastructure. However, we should send Green Lantern to check for anything suspicious," Batman responded.

There was murmur among the team, and everyone agreed that it would be for the best.

"There's one more thing I need. There is a recording of my interview with the Flash and Elsa. If any of you wish to see it, go to the interrogation room, and press play on the monitor. But, from what I've gathered, Elsa is more of a threat than she realises. I'll require her for experimentation, possibly a cure for her powers," Batman proposed.

Superman slammed his hands on the table. "No! We can't treat her like a prisoner, much less like a lab animal. She should be able to choose what she wants to do."

"You don't understand," hissed Batman, "She is strong enough to freeze over a city completely by 'accident'. She only unfroze it because the city stopped existing."

"Bruce, what we do here, it doesn't go to that extent, ever," said Wonder Woman, firmly.

He frowned. "If you people can't see what might happen if you leave her to her own device, then I don't belong with you here. I belong down there, where precautions are taken seriously," he accused. Batman then left the room, leaving the rest of League alone.

"Did that really just happen?" asked Hal. "Tell me I wasn't the only one who just saw Batman quit the League."

"He didn't quit, he'll be back," reassured Superman, but it seemed it was meant for himself.

The meeting was adjourned, and they were all dismissed.

Batman could not believe what he had just witnessed. The entire League had went against him. He knew the boy scout would definitely be against him, but Wonder Woman? Hal Jordan? The Manhunter? It was ridiculous. They couldn't see past the surface of the story. He hoped that if they watched the interrogation, they would come to their senses, but he knew that he would have to take matters into his own hands. Batman had a lot of work to do.

"What are you seeing, Hal?" asked Superman over the comms.

Hal had just been teleported to the city's vicinity, and he was now nearing it. "Something out of the future, Supes," he said, as he whistled.

The city consisted of multiple high rise buildings in the center, surrounded by smaller residences. It seemed like a utopia.

"Anything dangerous?" Superman said, nervously.

"Ring, scan for abnormalities," Hal instructed. The ring found nothing wrong with the city, and reported so to Hal.

"Nothing, Big Blue, everything here is as safe as can be," he grinned.

Superman was relieved; he knew Barry, the one that wasn't stricken by immense grief, would never do anything to deliberately harm anyone.

"Time for an announcement, isn't it Superman?"

They were meeting in the same room where Batman had stormed out of only hours ago. Only now, he wasn't there, and Elsa was.

"Queen Elsa," Superman started.

"Elsa is fine, now. I have no kingdom to rule anymore," she said, dismally.

"Well then, Elsa, the League has come to a decision; we want to offer you two choices," Superman began. "The first is for you to see Arendelle as it stands today. The second is to stay here with us, and potentially join us."

"Arendelle still stands?" she asked softly.

"Well," Superman hesitated. "In a way."

Elsa had agreed to return to her kingdom, and upon her arrival, she couldn't believe her eyes. It looked like something magical, something surrealistic. Was this what the future was like? It was so clean, and so peaceful. As she looked closely, she realised she knew some of the people walking by. When they saw her and League approach, they cheered, and she felt her heart surge with hope. Maybe Anna was right. Maybe they did the right thing.

"This is what the man who destroyed it built," Superman told her. "The man who's with your sister."

"He did this?" she whispered.

"Barry felt horrible for what he caused, and he took it upon himself to do the least he could," he explained.

"I guess I'll have to thank him," she murmured, still amazed at what she saw.

"What do you think?" Superman asked, hoping she would take the offer then and there.

"What was the second option?"

"We can help you here. We have helped others who have had trouble with their powers before, and we can do the same for you," offered Wonder Woman.

"Who was the Bat-man? He's not with you anymore." She remembered the tall man covered in black from before.

"Well look at it this way, Elsa. He took one look at your beautiful face, and went running. He's pretty hideous under that mask, he was burned a few years ago pretty badly," Hal joked, not knowing that Elsa took it as truth.

"What Hal means, is that we sometimes don't see eye to eye with the Batman, and today was one of those times," Superman explained. "But back to what we were saying. Your second option is to stay here with us, where we will train you to master your powers to the best of our ability."

'But what if I can't?" she trembled, remembering what she had done last time when you couldn't control them.

"Don't worry about that," Superman placed his shoulder on her arm to comfort her. "I know you will be able to."

Hearing this, and looking up to Superman who had a bright smile across his face, brought confidence and security to Elsa. "Thanks," she said, slowly smiling as well.

"I think, for now, I would like some time to think it over," she stated confidently.

"Take all the time you need," Wonder Woman assured.

Batman was going to see the former Flash, who now resided in a cell on the Watchtower. It was very comfortable for a cell, and he had access to media, such as television and newspapers. He imagined what the Joker or Riddler would do if they had such a nice abode in prison.

As Batman walked towards the cell, he turned a recording device on his suit, in order to monitor the conversation he was about to have.

"Hey Bats," Barry greeted.

"Barry Allen," he returned, noticing the immense writing on the walls and floor of his cell. It looked like complex mathematical formulas.

"Do you know how Anna is?" Barry asked, suddenly worried.

"Every time Jordan goes to deliver the people of Arendelle goods, she asks about you," Batman replied, still looking at the writing everywhere in his cell. "What's on the walls?"

"Oh, it's just something I came up for Arendelle. It's a shielding system, acting as an invisible barrier," he explained. "It makes it look so whatever it's guarding, isn't there."

"You did this all in a day?" Batman almost raised an eyebrow.

"When you have nothing to do, yeah, this is pretty easy to make in a day," Barry said while looking at his work.

"They're letting Elsa join the League," he stated, without warning.

Barry thought for a moment. "She agreed?"

"No, for the time being, she is in Arendelle, going over her options," Batman revealed.

"She is?" Barry was wondering why Batman would tell him all of this.

"The League gave her two options. Either join the league, or live a peaceful life in Arendelle," Batman clarified.

"So what do you need me for?" Barry asked, confused.

"I need you to convince her to not join," he said, frankly.

"Oh come on, there's nothing she could do that would harm us," Barry protested.

"You're not seeing the bigger picture," Batman was slowly losing his patience. "Imagine if one day, all of Central City was frozen, along with everyone in it. What would you do then?"

"Ok, but it's not like she would do that in the first place," Barry argued.

"Will you help me, or not?" Batman said, calmly.

"No, Bruce," Barry sighed. "Not in good conscience."

Batman looked at him for another moment, giving him his signature Batglare, before turning around and walking away.