I just had an insane stucky fic idea where endgame steve is from a different timeline (maybe captain hydra) who got mixed up in the vortex or forcibly switched with canon Steve. And canon Steve is trapped in the captain hydra world. And has to figure out how to get back before CH Steve does too much damage. And then canon Steve beats the shit out of CH Steve
Hoo yeah I can see that. (I did have a mad crack theory that he was Loki in disguise all along, or a skrull! Or you could have all three at once and veer into farce territory. 😂)
Thing is tho, that Hydra World is basically his original world, since SHIELDra and whatnot, so depending on when he gets stuck it might take good-Steve a while to notice?
Like, he thinks it's his-world because it's a wreck and that's what his-world is like post-Snap, but it's actually because of wifey and her quasi-fascistic org being even more successful there?
(It's really going to be so mid when they introduce a Bad Steve and/or a Steve who's living his worst stepford life with MAGA Carter and we'll all be like 'wow. Steve? being awful? in a late-phase marvel movie? I am shocked.' 😲🙊)