Supergirl and the Last Avenger

DISCLAIMER: I do not own Supergirl or Quasar, neither do I own DC or Marvel Comics characters or characters from the CW Arrowverse.

AN: Since I just watched the season three finale of Supergirl I have changed up the story a little, J'onn is no longer the Director, Alex is and Brainiac Five will appear instead of Winn. The Guardian/James will remain except now his identity is known. He and Lena will still be together. Sam and Ruby will remain in the story but I might just add a little Sam and Alex romance. So, back to the story.

The Unknown

Supergirl and Quasar appeared in a flash of bright light. When the light faded the two heroes stood in the middle of an expanse of white nothingness. They could feel ground under their feet but they couldn't see it.

Kara looked around nervously, her blue eyes widening as she realized that her powers weren't working. "Where are we?"

Quasar frowned; he knew where they were, but not how they go there. He certainly had nothing to do with bringing them here."This is the Quantum Zone."

Kara looked at Quasar curiously. "You know where we are?" She said, sending a glare toward the man she just met. "Why did you bring us here?"

Quasar frowned. "I didn't. I have no idea how we got here."

"I brought you both here," a mysterious voice said, but one that was very familiar to the Cosmic Avenger.

"Eon," Quasar said, not really believing that his old mentor could still be alive and in another Universe no less.

A doorway in the middle of the white walled room opened up, inside the door was outer space with stars twinkling in the background. A shadow came over the door before a green floating mass of a being appeared. The body was stocky and covered in a green moss looking substance, short tentacles extending toward the ground but the creature's body floated about a foot off the ground. In the center of the creature's body was a human looking face that smiled at both the Girl of Steel and the Cosmic Avenger. "It is good to see you Wendell," Eon said.

Kara turned to look at Quasar. "Wendell?" She said with a smirk forming on her face.

Quasar blushed slightly, especially considering how the smirk on Kara's face made her blue eyes twinkle, making her even more beautiful. "Eon," he warned.

Eon only smiled knowingly, since he was omnipotent and omniscient after all. "Yes, Kara Zor-El, his name is Wendell Elvis Vaughn."

"Elvis," Kara said, trying not to laugh at Wendell's middle name.

Quasar crossed his arms in front of his chest. "I go by Quasar now."

Eon's smiled never faded. "Yes, yes he does. It is good to see you my boy."

"Why did you bring us here?" Quasar asked not even trying to mask his annoyance.

Eon's smiled faded. "I was worried about you. I know what happened to your fellow Avengers. I wanted to make sure you were okay."

Quasar sighed. "I'm fine, Eon. It's just... I lost everyone... all my friends and colleagues. I'm alone now."

Eon frowned. "You are not alone, my boy. You have new friends, like Kara Zor-el. You have a new Earth to explore; don't worry about the old one."

Quasar was suspicious now. "Why not?

"Why not what?"

Quasar's eyes narrowed. "Don't give me that. Why shouldn't I worry about my old Universe?"

Eon looked down at the ground. "It's no longer there."

"What!" He yelled. "What do you mean its not there?"

"I'm sorry, my boy; your Universe didn't survive the destruction of the Infinity gauntlet."

Quasar stepped back his blue eyes wide and his mouth falling open; tears began to pool in his eyes. "My mom... my sister... I never got to say goodbye." He turned away from his mentor, stepping away from Kara as well.

Kara felt sorry for the young man. She walked towards him before tentatively placing her hand on his shoulder. An electric spark shot up her arm; something that she never felt before. She removed her hand quickly just as Quasar turned around with fresh tears streaming down his cheeks. The sight broke Kara's heart. "I'm sorry about your family, your friends, everything. I know what it's like to lose your whole world, but the entire Universe, I can't imagine that."

Quasar wiped his tears away with the back of his hand. He nodded as a small smile stretched across his face. "Thank you," he said.

Kara stared at him questioningly. "For what?"

Quasar's smile broadened. "For caring about me."

Kara blushed at his insinuation. She knew he wasn't insinuating that she liked him, but part of her realized that she did, she really did like him. "You're welcome, Wendell," she said with a mischievous smirk on her face.

Quasar's blue eyes narrowed. "You're going to get it," he said before he lunged forward to tickle the Kryptonian girl before him. Kara began to laugh uncontrollably.

"Stop," she said, but her laughter made it hard for her to say it.

Eventually, Quasar stopped his assault; he was out of breath. He stepped away from Kara, quickly realizing how close he was to her. "See... I t-told you... I'd g-get you," he stuttered, blushing furiously at the way he had acted.

Kara took a few deep breaths as she recovered from the tickle assault. She smiled at him, amused at the way he stuttered. "I'll get you back soon enough." However, her threat was half-hearted; she was too confused by her feelings for the man in front of her.

Eon cleared his throat earning the attention of the two heroes. "Wendell, I brought you to this Earth to give you another chance, to live on a world similar to your own but also different. This Earth knows about alien life and has accepted it to a degree, maybe with the Protector of Universe here they might be even more accepting, just like you are."

Kara looked between Eon and Quasar. "Protector of the Universe?" she asked curiously.

Quasar sighed. "It's a long story."

Eon chuckled lightly. "One that Wendell does not like to talk about."

"It was dumb luck that I became your champion, wielder of the quantum bands."

Eon frowned. "It was destiny my boy, believe me, as the child of Eternity and Infinity, protector of life, I appointed you Protector, not because you wielded the bands, but because you wielded them like none before you. You truly are the greatest protector that I ever appointed."

Quasar shook his head. "No, some protector, my world, my Universe is gone. I failed you Eon."

Eon moved toward his champion. "You saved your world and Universe many times over. No, the last battle was destined to happen. I am glad that Carol saved you. She gave me the chance to let my greatest champion live, to allow me to bring you to this new Universe. A Universe that needs your help."

Quasar looked into the face of his mentor. "My help, what's happening?"

Eon looked toward the ground. "You know I can't directly interfere in future events, I can only guide you to where you need to be. You need to be on this Earth and with your new friends, like Kara here."

Kara blushed slightly at the way Eon called her Quasar's friend. "Should I be worried about this threat as well?"

Eon turned to look at the Kryptonian. "Yes, be prepared and don't let your guard down, Supergirl. Let Wendell help you where he can, but you both will know when the threat arrives."

Kara nodded before she turned to look at Quasar. "I would be happy to have you fight by my side."

Quasar blushed at her statement. "It would be my honor."

Eon smiled at the two heroes knowingly. "Goodbye my boy, but don't worry, we will see each other again," he said before his eyes flashed brightly, lighting up the entire room and flashing Kara and Quasar out of the Quantum Zone.

DEO headquarters

Alex stood at the round table in the center of the main DEO control center; Brainiac Five was at her side.

"So, this human survived crashing into the ground as a meteor and then used these bands on his wrists to create a force shield strong enough to keep Supergirl out of his way, is that right?"

Alex sighed. "Yes, Querl," she replied, exhausted from his countless questions.

"Remarkable," Querl said. "The bands must house tremendous energies, such weapons would be a great asset in the fight against my ancient ancestor."

"Except," Alex started, gaining the attention of the Legionnaire. "Quasar is in this time and on this Earth. I don't think he would want to travel to the future."

"It couldn't hurt to ask. Such power is impressive," Querl replied just as a bright light filled the DEO headquarters, when the light faded Kara and Quasar stood in the middle of the room.

"Kara," Alex yelled before running toward her sister, engulfing her in a hug and looking over her to make sure she was okay. "Where were you?"

Kara smiled. "I'm fine," she said before looking at Quasar. "We're fine."

Alex turned to look at Quasar, sending him a glare. "Where did you take her?"

Quasar raised his hands; Alex's tone of voice making him defensive. "Hold on a minute, I didn't take her anywhere. She happened to be next to me when my mentor, Eon, decided to visit me."

"He couldn't do that here at the DEO?" Alex questioned.

Quasar smiled. "Eon, isn't like us; he's millions of years old and most of his body exists in the Quantum Zone, so it is easier to visit him there, if he came here it would only be for a few seconds before reality would begin to shift and the very atoms that make up this plane of existence would begin to dissolve."

Querl's eyes widened at the thought. "Incredible, maybe one day I could go to this Quantum Zone and meet this Eon."

Quasar looked at Kara for help. Kara smiled at the look on his face. "Quasar, this is Querl Dox, also known as Brainiac Five, he's from a thousand years in the future and is an AI entity."

Quasar smiled. "Nice to meet you Querl," he said extending his hand to the Legionnaire.

"You don't seem surprised to meet an alien AI," Querl said.

Quasar's smile widened. "Let's just say that my job allows me access to most of the Universe and its inhabitants. I've seen much weirder beings... not that you're weird."

Alex smiled. "Don't worry, he's weird," she said, earning a glare from Brainiac Five.

"Alex, this Eon said that he brought Quasar to this time to help us fight a future threat, but he was unable to tell us what it was."

Querl nodded. "Most likely he couldn't tell of future events since that could alter the timeline."

Quasar smiled. "Yes, that is what he told me. Eon is like that omnipotent and omniscient; he's damn frustrating that way."

Kara smirked. "So, it looks like Quasar is our guest."

Alex nodded. "So, I'll need to make up an alias for you then."

Kara smiled mischievously. "Don't worry, Quasar isn't his real name," she said, watching as Quasar sent her a glare. "I'd like to introduce both of you to Wendell Elvis Vaughn."

Alex held her hand over her mouth to keep from laughing.

Querl smiled. "A wonderful moniker."

Quasar's eyes narrowed at Alex and Kara. "Thanks Querl, how about you show me around?"

Querl smiled at the suggestion. "It would be my honor." He began to lead Quasar around while the aforementioned hero sent another glare toward the sisters.

Once Querl and Quasar were out of sight Alex turned to Kara. "You seem quite happy and mischievous today, it wouldn't happen to do with our new guest?"

Kara's eyes narrowed at her sister's insinuation. "I feel happy today, it has nothing to do with anyone."

Alex nodded knowingly. "Sure it doesn't." Kara frowned at her. "Come on, let's get Wendell an ID." Kara's smile returned at the name before she followed Alex into the next room.

AN: There you go, the second chapter, the entry of Eon will be important to future chapters and explaining a little more of Quasar's backstory. Please favorite and review, thank you!