So here is chapter 1. It's not that long but I think
the other chapters will be increasingly long ;-)

Chapter 1

Until he found that half dead guy it had been a normal day in the life of Peter Parker.

He had gotten up for school just like any other day, had eaten breakfast and kissed his aunt goodbye. School had been as boring as always but he told himself constantly that it was his last year so it would soon be over. He had eaten lunch with Harry and Gwen as usual. After school he had dressed as spider-man, swinging around the city for a bit, catching two car thieves and one bank robber and saving a small child from a burning house. A normal day in every sense.

It hadn't been until nightfall that something unusual happened. He had just been passing a deserted quarter store when he suddenly heard a loud crash nearby. Naturally, he immediately headed towards the noise, sensing that something was wrong. Soon he came to a dark and narrow alley, where he found some trash cans knocked over. Peter laughed at himself for being so paranoid, thinking that it was probably just a cat, when he noticed a small figure lying on the ground next to the trash cans.

He approached the motionless body and gasped slightly at the sight. A man was lying there on the concrete, with messy long black hair and blood smeared all over his very pale face, eyes shut. Peter crouched down putting to fingers to the man's neck to feel for a pulse and sighing in relief when he found one. Not dead then, only unconscious.

He took a closer look.

"Holy shit!"

The guy's ribcage looked as if it had been used as a punching bag. Peter doubted that there was even a single unbroken rib left. His clothes seemed to have been dark green and black at some point in time, but were now dirty and ragged. He had no shoes therefore Peter was able to notice several missing toenails on his feet. The far too pale face was covered in bruises and slightly sweaty. In addition to that he seemed to have four broken fingers and a broken leg. And those were only the injuries that were visible to the naked eye. Surely there were also damages done to the internal organs.

Peter reached for his pocket in order to get his cell phone and call an ambulance only to realize that it was still lying on his desk at home. He cursed under his breath. What to do now? He could hardly leave the injured man alone, but there was no one around, he was all alone. He gently patted the guy's pale cheek. "Come on, wake up!" he murmured anxiously. Maybe when the man woke up, he could at least tell Peter who he was and where he lived. He couldn't believe his luck when the other's eyes fluttered open after several moments. The injured man looked around with unfocused eyes, confusion written all over his face.

"...Thor..."

Peter had to bow down even further to understand the whispered word.

"Thor? Is that your name? Where do you live?" he asked, brow furrowed. For a moment the man looked at him with bright green eyes. Then he closed his eyes again.

"No please! You have to stay awake!" Peter pleaded desperately. The man's eyes remained closed, but his mouth moved and leaning closer to him Peter picked up one word.

"Avengers..."

After that the injured slipped into unconsciousness again.

Tony Stark poured himself his fourth drink that evening. It was around 9 pm and he didn't know what to do. Pepper was on a business trip to Los Angeles, Bruce, who resided in Stark Tower most of the time, was currently out at the Opera (it was great that the big guy dared to go into public again but opera wasn't really Tony's thing) and Steve, Natasha and Clint were out on a mission somewhere in Europe and wouldn't be back until the next week.

Left alone Tony had just decided to watch a movie when he heard a soft thud on his balcony.

"JARVIS, what's going on? Is it Thor or just a very big bird?" he addressed his AI.

"Neither, Sir, it seems to be two men, one masked and one seemingly unconscious and injured."

"Do they pose a threat?"

"I am afraid I am not able to tell, Sir" the AI replied calmly.

"Oh great." The inventor sighed. "Prepare the Mark VIII in case it comes down to a fight."

"Yes, Sir."

Tony put on the infrared bracelets and stepped out on the balcony. In the middle of the tiled platform there knelt a man dressed in something that looked like a red and blue whole-body-suit holding a limp motionless figure in his arms. The strangely dressed one looked up when Tony approached the two of them.

"Can I help you somehow? You know I also have a door." Tony greeted while eyeing them cautiously.

"I'm really sorry for bursting in like this man, but I didn't know where to take this guy." the red one answered. He sounded quite young. Tony looked him over from head to toe. That red one seemed familiar to him. Then it dawned to him.

"You're that Spider-man who saved the city from that crazed Lizard, right?" he asked curiously.

"Yes." the other replied sounding a little proud.

"That was great work. Anyway, what happened to that guy?"

"I don't know. I was on my way home when I heard a loud crash and then I found him, lying there unconscious."

"He drunk?"

"Can't smell alcohol on him, but he seems to be pretty injured."

"Then why did you bring him here? A hospital would probably be a better place for him."

"I know, but he said something about Thor and the Avengers when he gained consciousness for a moment and honestly, I don't believe he just got in a fight or got beaten up by some idiot..."

Tony frowned. Then he stepped closer and knelt down beside the unconscious form. When he looked the man in the face his breath caught.

"That is absolutely impossible..." he murmured to himself. But the Spider had heard him.

"What is impossible? Do you know him?"

"Yes. Yes I do. But I have no idea how he came here."

"Who is he then?" Spider-man asked curiously.

"His name is Loki," Stark answered. "And he's not from this world."

One of the Chitauri approached Thanos' throne.

"My Lord, the Asgardian prince..."

"What is it?" the Titan growled dangerously quiet.

"He... He's gone my Lord!" the Chitauri whispered, fear showing clearly in his voice.

Thanos kept silent for a moment. Then he looked at the poor Chitauri and the latter's head exploded.

Thanos turned to the surrounding Chitauri.

"Get the wimp back." he ordered quietly.