Such Sweet Revenge (слэш)

When the Rogues are back in the States after being pardoned, the New Avengers want nothing to do with them and as far as Tony is concerned, if he never speaks to them again, it'll be too soon. After all, he didn't spend the last year putting himself (and his family) back together only for his former co-workers to ruin all of his hard work.
But then he gets a hand-written letter from the Winter Soldier himself, apologizing for the events that transpired and an off-handed comment from Rhodey about Rogers failing to take care of an obviously miserable Bucky Barnes sets in motion Tony's new, oh-so-evil plan to get some payback.
After all, what better revenge than to steal the Winter Soldier away from his best friend?
The only problem: Tony sucks at being vengeful, but apparently he's an expert at inadvertently falling in love.