I have this massively complicated AU mostly in my head that I've been trying to write out. I call it Earth Zero (hence my Tumblr name). One of the key departure points from canon is that Bucky has a huge family that never forgets about him. Also, Bucky was married and had kids before the war, so he has direct descendants who not only want to get their dad/grandpa back, once they learn he's still alive, but actually have the means and skills to do it (military and medical training).
OOO IM INTO IT!!! Tell me more (if you’d like)!