Justice League Unlimited/Avengers Earth mightiest Hero Prologue

Disclaimer; All DC character and Marvel characters are property of their reparative companies I only own the original characters that will appear in the story

An; I like to thank my beta reader Darke Eco Freak current in the process of rewriting some of the story.

Kara and Barbara's Apartment

Metropolis, USA

Inside a small decorated apartment is a small coffee table upon which are two bottles of nail polish and two small PDA-like devices, an opened Pizza box and two bottles of Diet Coke, a small TV with a Blue ray player with playing a film. On the sofa behind the coffee table are two girls in their late teens, one Kara Kent and her best friend, Barbara Gordon, both girls are wearing nightgowns and towels wrapped around their heads.

"This is the life no night time patrols just a girl's night in," Barbara Gordon sighed taking a slice of pizza.

"Man I can't believe this is the first time we have had off in two month. So Babs are you planning anything for the weekend?" Kara Kent asked helping herself to her own slice of cheesy goodness.

"Not much, I think I might head over to Gotham City and visit my dad, I mean, I did miss his birthday last month when we had to go off world but knowing my luck we're going to get called in," Barbara muttered, taking a sip of her diet Coke.

"I'm surprised Batman let you join the League, it his thing after all," the blonde mused.

Flashback Two months ago

Batman, Superman, Hawkgirl, Wonder Woman, Flash and Green Lantern were sitting around a large table inside the Watchtower. Files of possible recruits covered the table and no one notices a black haired, green eyed God by the name of Loki, leaning against the wall with his arms folded across an armour clad chest.

"I move to recruit my cousin, Kara, to join the League. Her skills have been and still are improving and I feel she would make an excellent addition to the League," the Man of Steel voiced. This was met by several murmurs of agreement, considering how volatile she had been in the beginning, the female Kryptonian had made vast improvement.

"Hey Bats what about Batgirl? She's another great choice for the league, besides we could always do with another moody bat themed hero on the team," the scarlet speedster joked.

"No," the Bat replied so quickly it had to be instinct.

"I don't think it's your choice Bruce, if she wants to join the League then you can't stop her," the Amazonian warrior reminded him, a hint of warning in her tone.

'Hmm, he is harder to manipulate than the other heroes, but nothing the God of Mischief cannot manipulate. I have watched this group for years and I know Batman and Superman are a great team and I have seen firsthand that Batgirl and Supergirl just as well. After all, I am the one that had Livewire transported for treatment in Gotham and made it possible for her to escape and join up with Poison Ivy and Harley Quinn. I have seen how the duo beat the three of them, one might even think it were easy.' thought Loki to himself as he came up with an idea on to get what he wanted

"Summon both Batgirl and Supergirl to the tower to discuss their joining the league," Superman ordered.

-Two Hours later-

Batgirl and Supergirl arrived onboard the Watchtower and entered the briefing room to find the Original Seven all watching the pair of sidekicks.

"We have summoned you here to discuss the both of you joining the Justice League," the Man of Steel explained at their confused expressions.

"Both of us?" Supergirl and Batgirl asked simultaneously.

"Yes, both of you.I recommended you, cousin, and Flash you, Barbara," Wonder Woman supplied.

"We agree to join the League," they both answered, in sync once more, they were just that excited.

Present

"I've been meaning to ask how you felt about what that bastard Dr Hamilton did," the red head brought up.

"I still find it hard to believe. He was one of Clark's most trusted friends, to think he would go and do that, plus that thing nearly killed some of my friends," the blonde muttered, sky blue orbs darkening for a split second.

Watch Tower

Mr Terrific was working on the computers when he noticed the silent alarm going off at Metropolis STAR labs, none noticed the Trickster God standing just behind him.

'It's taken me months to manipulate those fools at STAR labs to create a second Cosmic Cube and now I just need two people to test the device and I think I know just the two test it on. If it works, I can recruit some powerful villains to destroy my brother and then the throne of Asgard will be mine!' the God cackled silently.

~Superman and Batman are busy with another task in Gotham. However, you can send Supergirl and Batgirl in their stead, they are closer and they can handle a few lowlife criminals breaking into STAR labs~ Loki instructed Mr. Terrific telepathically a large smirk on his face before he disappeared..

Kara Kent's Apartment.

Kara noticed that her Justice League communicator started beeping, with a sigh, she picked it and noticed it was Mr. Terrific.

"Supergirl here, what's wrong Mr. Terrific?" Kara asked, playing with one blonde lock, 'speak of the devil and he shall appear' worked on situations as well it seemed.

"The silent alarm has been triggered at the Metropolis STAR labs. We need you and Batgirl to check it out," Mr. Terrific explained.

"Sure we'll check it but quick question how'd you know Batgirl was here anyway. What about my cousin or Batman?" Kara questioned. Really, anything that happened at STAR labs went to Clark and since Bats was always with him, the duo where usually the ones to deal with it.

"No time for that Supergirl, we need you there now. I've sent a message to Stargirl and Stripes so they'll meet you there, please hurry," Mr. Terrific pleaded, cutting the transmission.

"Fine," Kara grumbled, shutting off the communicator, she turned to face her best friend Barbara Gordon.

"You got your Batgirl costume?" Kara asked.

"Yeah of course, it's in my suitcase. Where do we have to go?" the red head inquired, not even bothering to ask why, it was obvious anyway.

"We have a robbery at a STAR Labs here in Metropolis, you up for a late night outing. Wait, don't answer that, as part of the League, we've got no choice but to help," Kara reminded her red headed bestie. Barbra just smiled at the Kryptonian and unzipped her suitcase, revealing her costume as well as several weapons.

"How do you get that through airport security?" Kara asked, one blonde eyebrow raised.

"I just say it's a cosplay costume," the red head explained with a shrug, heroes were popular, especially the famed BatFamily. The blonde just shook her head and went to her room to change, greeting the Bat when she got back.

S.T.A.R Labs

Metropolis, USA

Loki left the STAR Labs building holding the cosmic cube in his left hand and holding his staff in the other hand. He couldn't help the maniacal laugh as petty mortal police blocked his path, he grinned at them and spread his arms wide, prompting them to fire.

'They are just as quick as my world's foolish SWAT and S.H.I.E.L.D,' Loki mused, casting his gaze to the skies and immediately spotting the Supergirl and Batgirl.

'Perfect, my little test subjects have arrived, now let's see if I can use this Cosmic cube to send people from this world to my universe. If this works, then I can send some powerful villains to help me and what I have planned to conquer Asgard. I shall become the rightful ruler of Asgard!' he planned.

"Whoever you are, you won't get away with what you stole from the lab!" Supergirl yelled as she dropped Batgirl to the ground, not slowing in the least as she flew towards Loki. He simply raised his staff and fired an energy ball, it sent the blonde crashing into the side of a SWAT van.

"You may call me Loki, peasant, God of Mischief and Lies, soon to be ruler of Asgard!" he declared pompously, waving his hand at the batarangs headed his way, turning them into harmless pieces of ice. Supergirl returned to Batgirl's side as the ice shattered, both adopting different fighting styles.

"I have no idea what we can do against this Loki person. He's using magic, you know how magic affects me," Supergirl muttered, unsure of whether or not this Loki character could hear her or not.

"Contact League, see if we can get some help from Doctor Fate," Batgirl instructed, ducking as an ice dagger intended for her head.

~you don't need help from the League. You can take me alone, make a name for yourselves~ Loki suggested quietly, his words slipping into the blonde's mind, influencing her.

"Forget him, we can take Loki down ourselves. If we don't they will never give us our own missions," Supergirl rationalized, yeah that made sense. The league would treat them like rookies, nevermind that they had both been on dangerous missions of their own, they needed to make a name for themselves in the League.

"Are you sure?" Batgirl yelled, flipping over a SWAT van to avoid a volley of ice arrows, what was with this guy and ice?

~Of course you're sure. You are just as good as your cousin, better. He refuses to do what must be done, you could be a better hero than he ever was ~ Loki reinforced, feeding her a false anger that would override her commonsense.

"Yes, I'm tried being in Superman's shadow all the time!" Supergirl snapped, remembering all the times Clark had let dangerous villains go free, "What about you? You aren't tired of being in Batman's shadow?"

~Listen to her, don't you want to make a name for yourself? Would you rather be stuck in the shadow of the Bat? Think of Nightwing, think of Red Hood or Robin~ Loki whispered, sifting through the girl's memories, pulling out various names that would incense her to fight. To let go of reason so ingrained by that stupid mortal.

"You're right! We attack on three," Batgirl ordered, disregarding the niggling feeling at the back of her mind that something wasn't right somewhere. The pair charged the Trickster who simply fired an energy ball that struck Batgirl and sent her flying into Supergirl who caught her easily.

"You okay?" Supergirl questioned, using her x-ray vision to scan her friend for broken bones.

"Yeah just had the wind knocked out of me, I'll be fine," the red head assured her friend, twisting out of the Kryptonian's grasp, landing heavily.

"You will serve to test this version of the Cosmic Cube on my young heroes," Loki explained, not that it helped them understand anything. What the flip was a cosmic cube? The gold and green dressed man lifted the blue cube which had started to glow as well as the two girls. There was a blinding flash and when the spots cleared from the police officers' eyes, the realized both girls had disappeared. The strange man who claimed to be a God, put a finger to his lips before vanishing into thin air.

One week later: Watch Tower Debriefing Room.

Mr. Terrific sat at the table with Superman, Batman, Wonder Woman, Flash, Hawk-girl, Martian Manhunter and Green Lantern

"Any idea who this character is that kidnapped Supergirl and Batgirl?" Superman asked, trying to suppress the slight twitch in his jaw. It was a well known fact that the man of Steel usually went ballistic whenever his cousin went missing, which was rather often.

"From the police report, he calls himself Loki and I checked the S.T.A.R labs mainframe. According to their database, nothing was stolen, they weren't working on anything. I say that it was something from their merger with Cadmus, a repeat of the Ultimen maybe," Batman suggested.

"Then who's this Loki character?" Flash asked.

"I think he is what he said he is: the Norse god of Mischief and Lies," Wonder Woman answered.

"Come on, you really expect us to believe that Princess?" Flash questioned incredulously.

"Why does this seem so strange? You have met Hades, is it so hard to believe in the Norse Gods?" Wonder Woman rationalized.

"Then how do we track him down and find Batgirl and Supergirl?" the scarlet speedster inquired, trying to hide his mess up.

"I don't know. Magic is volatile, hard to track," she added.

"What about their communicators what about tracking them that way?" Flash suggested.

"No good, we can't even find their communicator signal," Batman replied solemnly.

"So what are we going to do about it?" Flash asked, he'd had his share of disappearing into different dimensions, he only hoped this would be like that.

"I've contact Dr. Fate for his help and he is currently working on locating them. We need to give him time to find them," Batman explained, while secretly worrying about Barbra, what would he tell her father if they never found her?

End of Prologue.