Percy Jackson, or Tony Stark

Tony is shot and some random guy shows up in outer-space with us. Fun times.

It looked, to anyone watching, like Tony was splitting in half and a new figure was emerging from within. All in all extremely creepy and somewhat off-putting.

When the screaming hadn't stopped five minutes later, they all turned back to Thanos and his dramatic speech. "And when this universe is equal, I shall rest. I shall live on in glory!"

"The world shall see equality!"

As Thanos raised his hand, the screams in the background dimmed, and there stood a grumpy looking Tony. Seeing as moments before he looked like he was being torn apart from the inside, he was rather well.

His forehead was laced with beads of sweat that dripped down off his chin in a steady flow. His usual impeccable grin was a little wonky, and his hair was frizzled and sticking up like he'd been stuck in an electric plug socket.

Askew, his tie sat blown over his shoulder, and his suit was rumpled. But he was smiling for once. A creepy smile that was chilling to the bone. A smile that said goodbye.

"This form really doesn't suit you." He nodded to the purple titan.

His allies all facepalmed and frowned. Rule No. 1: DO. NOT. AGGRAVATE. GIANT. PURPLE. MAN. = broken.

"And that gauntlet is just tut, tut. Tacky. I thought you had better self control than this. Do you know what Hades would say?" Tony waggled his finger.

Thanos frowned almost as deeply as Steve, which was saying something. "I thought the gold complimented my skin."

"It would, in any form other than ugly grape dude."

"Yes," Thanos paused. "But this colour is Alkestis's favourite. She said it makes me look handsome. Plus, it was her favourite."

"Did something happen to Alkestis?"

"Zues."

Tony nodded sympathetically, and Steve's hold on his confusion snapped. "wHaT aRe YoU dOiNg?!"

"Talking. You?"

Steve frowned again. "I think that -"

"EQUALITY!" Thanos roared over the top of them, "As I was saying, equality is the road to peace and perfection."

"We can be equal without all these people dying, you're just making your own job harder." Tony said with a small smile.

"Who do you think you are, insolent mortal, that dares to interrupt me, the great Thanos?!"

Before Tony's first answer could get out, his ADHD brain yelled, "Isn't your name Thanatos?"

The supposed 'titan' sniffed, "Alkestis used to call me that."

"That's because it's your name you DiNg DoNg!"

A nervous looking Peter tapped Mr Stark on the shoulder, "Mr Stark are you feeling okay, you're acting kind of weird."

"I'm feeling great, Peter. Feeling strong, all I need is that last push over the edge and then I'll be fine."

Bucky grabbed Peter and pulled him away from Tony with an oddly protective look.

For a second no one moved, and then Thanos - or Thanatos - shot a beam of light from the end of his fingers right at Tony. He was shot back at least 200 metres before falling to the ground in a crumpled pile.

A collective cry of gasps and "Tony"s flew around, with one especially teary "Mr Stark!"

Even Steve looked broken for a second, before changing his expression to a more grumpy foreboding one. There was a surge of people toward the fallen body of Tony, when Loki cried out in pain.

Nothing was visually wrong with him. No blood, no splicing magic, although their shield was flickering more and more. And then suddenly, poof! There was no green sheen to the air. There was no protection. There was just open space, and an inviting silence.

An unsettling silence.

No one moved to speak, to fight, they just stood stock still. Ready to pounce. Coiled up like a panther, the first one to move was Loki, with another moan of pain. And then, from Peter, "it smells like salt! Can anyone else smell that?"

There were collective nods, and then a stream of water shot into the air from where Tony had been laying immobile on the ground. The water waved like whitewash about to crest and break. And then it took a form that strongly resembled a horse and ran loops around Thanatos.

"What is this tomfoolery?" He growled, swatting at the water as it spiraled closer, dissapitating every time he would have touched it.

"You asked who I thought I was." Said a form rising from Tonys lying spot that definitely wasn't Tony.

He was still a he, but he had ruffled ebony hair, enraged green eyes, and couldn't have been older than 18. The water horse that had been circling Thanos galloped to him and whirlpooled around his hand, gathering water. 

"I think, I'm Percy Jackson, and, unless I'm mistaken, and my trip to Alaska was a lie, you owe me a favour, my dearest death god."