@jabberwockypie asked for “Methos & MCU Loki, Magical Accidents + Awful First Meeting”.
For this meme.
Ok, so this one is going to be more outline, because this one wants to be an entire AU.
So, Methos is a couple hundred years post dropping Kronos down a well and walking away from being Death on a horse when he meets this very young and somewhat confused sorcerer (ok, so he assumes sorcerer rather than alien or deity, ‘cause hey, he’s not that far away from having been all but a god himself, and still is working on not thinking of himself as one, so he’s just going “there are no gods”, because it works for him).
And he really doesn’t think he’s in any fit state to teach anyone anything, but this barely-more-than-a-kid (still a kid, honestly, Loki’s a teenager who’s experimenting with magic, and poking at things, and accidentally poked at a way to get between one world and another without using the Bifrost. He’s still trying to figure out how he did that) really needs someone to look out for him, at least. Because oh is he clueless. And a bit arrogant as sorcerers so often are, but Methos can live with that. (He’s lived with worse, and recently. This is nothing.)
… Things go downhill from there. Because nothing can go wrong with a confused and cranky teenager who’s experimenting with magic and an ex-terrorist with an ego the size of Europe, right?
Methos and Loki will never admit to what happened that first month or so they knew each other. There may or may not have been witnesses, accidental shape-shifting, and an incident with a horse. (The myths have to come from somewhere, and after all this time, who knows how the story distorted?)
And that covers the tropes themselves.
Fast forward to post-Highlander canon, and oh, about the time Thor’s hammer lands in New Mexico.
Methos is hiding from MacLeod, the Watchers, and probably his bar tab with Joe, and he’s meandering his way toward Mexico because tropical sounds like a plan. He hears about this weird hammer out in the desert when he stops at a bar, and decides to go take a look, because curiosity has always been a weakness of his (or a strength, depending on how you look at it, but this time, he decides it was definitely a weakness).
He might not recognize Mjolnir on sight, but he does recognize the decorations on it, and is contemplating bolting, because he Does Not Get Involved these days… except Coulson shows up, and Methos has the misfortune of being recognized because of a short disaster of a lifetime that was the one just after Adam Pierson, and is supposed to have been dead for the last several years.
Methos is not best pleased to be stuck in New Mexico, and even less so when after they catch Thor trying to get his hammer back, Loki shows up. Granted, he’s there to make sure that Thor never tries to come back to Asgard, but that doesn’t mean he lacks a few minutes to spare to drop in on an old friend.
This shapes up to be several more awful first meetings. (Thor, Sif, the Warrior’s Three, Jane and Darcy, Clint Barton. Methos is not entirely sure this is better than having to deal with Watchers, MacLeod, and Joe refusing to give him more beer until he pays up – which wouldn’t be a problem if the old Watcher would just take his money, instead of insisting he pay his bar tab with true stories.)
Shit happens, Thor goes home, and Methos hopes that maybe things will settle down. Except, no, he doesn’t get to go hide somewhere tropical and warm and lovely and spend a lazy decade on a beach somewhere. No, he gets dragged off by Coulson to meet some director or another, and oh, look, someone else from early on in that disaster of a lifetime, does someone have it out for him? (Why, yes, yes the author does have every intention of making your life entertaining, Methos, why do you ask?)
Which is how Methos gets unwillingly recruited to SHIELD, and ends up being on the helicarrier when Loki is brought in during Avengers.
This goes about as well as you think it does. Put one ex-terrorist with 5000+ years of experience in how to fuck with humans, and one alien sorcerer with PTSD who is about to make a spectacular game of getting himself safely away from his abuser on the same flying vehicle, and launch a brain-washed assassin and a team of mercenaries at it.
Yeah.
Methos has a newly-Immortal Coulson on his hands, a desire to go after Loki and ask him what the fuck, and also Thor has noticed he’s here. This is fine. Great. Excellent. He’s glad he arranged for the other three Horsemen to end up short their heads, so at least that can’t go wrong.
He’s still not going to get that lazy decade on a tropical beach any time soon.
…. And that’s where my brain goes “need more input before weaving Methos into the whole of the franchise”.