Author's Note: This is a work in progress, but if you like it I can make more. I don't think it counts as Doctor Who/Avengers crossover, but it takes some ideas from Doctor Who.
Disclaimer: As much as I would love to, I don't own The Avengers or Marvel. They belong to Stan Lee and Joss Whedon respectively.
Once Upon a Dream
"Clint, behind you!" Steve Rogers shouted.
"Right!" Clint Barton switched to his bomb arrows and quickly shot one in the six-legged creature's eye. "Cap, Vespiform at twelve o' clock!"
No sooner had Clint said this, than Steve had thrown his shield and decapitated the bee-like creature. "Well, I think that's the last of them." He jumped down from the ledge of the bank where he was for the battle.
"It seems to me that Loki wasn't finished with us yet." Clint said as he slid down his grappling arrow.
"I would have to agree with you there," said a voice from behind them. They turned around to see Thor landing with a loud THUMP; making an indent of his hammer in the concrete. "I have just come from our headquarters. Agent Fury needs to see all of us right away."