The Greatest Supernatural/Avengers crossover I've never seen:
Sam and Dean try to summon Gabriel while still thinking he's the pagan god Loki... and summon MCU Loki. Who isn't feeling like planetary domination at the moment (not with a planet infested by demons, anyway.) He just hangs around for a while to fuck with people and accidentally ends up befriending team free will and helping stop an apocalypse.
When people from Loki's universe come looking for him, no one's more surprised than Loki when TFW get all 'try it BITCH' over him but yeah.
No one's gonna touch him in THIS universe.











