For the anon who would love a post of Charles Xavier and Erik Lensherr from X-Men: First...
Oh my god this is an amazing idea. AMAAAAZING.
I have a couple of different scenarios, where Charles and Erik switch places. In both, the Americans and the Soviets come to a deal, after both mutants are neutralized (idk, with tranquilizer guns?): they each get one. (We’ll say for the sake of argument that Erik gets Azazel to transport everyone else off the beach.)
in the first scenario, the Americans get Charles and the Soviets get Erik. During the collapse of the Soviet Union following the end of the Cold War, the scientists in charge of the installation where Erik’s on ice (and periodically woken up to be experimented on) somehow lose track of him in the chaos and he ends up in the hands of a HYDRA-like “take over the world” organization. Their mental conditioning works especially well on Erik because it meshes so closely with Erik’s desire for control and security—too well because, when he wakes up accidentally, he destroys the unfamiliar place he’s in and escapes.
Across the globe, the US government hears about the massive amounts of destruction being caused by a rogue mutant. Under pressure from a now-older Hank McCoy, Raven Darkholme, and Moira MacTaggert (granddaughter of the original), and maybe under orders from SHIELD, Nick Fury orders that their asset be woken up. More chaos happens when Charles realizes what’s happening and he determines to go to Russia now to save Erik.
Then there’d be a lot of telepathic stuff and hopefully Charles would be able to remove the conditioning and help Erik remember himself. And there’d be lots of cultural missteps, like Charles realizing his flirting is even less welcome in 2011 than it was in 1963.
The second scenario is basically just the reverse of the first. Only, as you might be able to imagine, brainwashing a telepath would be so much worse. And un-brainwashing a telepath would be nearly impossible. Maybe Erik, after being de-thawed, is living with Raven at the house in Westchester, as she inherited it after Charles was declared dead, and then Moira’s granddaughter shows up one day and simply says “we need your help.”
Erik has no idea what would make them think he owes them anything, but he listens and learns that there have been numerous what can only be described as telepathic attacks on important scientific, cultural, and political figures. At first Erik doesn’t believe it, because this is (or could be) Charles, but then Moira shows him a blurry picture taken on someone’s cell phone and… yeah, it’s him.
Cue finding the anti-telepathy helmet, but the only way Erik can even begin to help Charles once he’s neutralized is to take it off and see if Charles recognizes him or if Charles annihilates him.
…or, depending how estranged they are… if Charles recognizes him and THEN annihilates him.
(It could be post-beach divorce: they gave Bucky a bionic arm, they could give Charles a bionic spine/legs/whatever. Though of course he’d have to give it up when/if he turns back, because the bionics have drugs/bombs/whatever built into them in case his handlers need to neutralize Charles. Erik would have to use his magnetism to stop the mechanisms until Hank could get it all out of Charles.)