Next year, Captain America: Civil War will pit one part of the Avengers against another. The teams have already been revealed, with a clear advantage for Iron Man's side "“ they do have Vision after all, whereas Captain America's team has no actual heavy hitter.
But there is something which might have skipped anybody's mind "“ there are spies among the Captain America: Civil War teams. And we are not talking about those who are actual spies (such as Black Widow), but about double agents infiltrated in the teams.
So who might these be?
Hawkeye

Hawkeye is the least likely to betray his teammates in Captain America: Civil War. As everybody knows, he is against the Accords/Registration Act simply because he has a family to protect.
And he has hidden his family very well while working for SHIELD, because there was mutual trust between him and Nick Fury. However, who is to say that the council who will watch over the Avengers is trustworthy?
Hawkeye has no reason to betray Captain America for Iron Man.
Of course, we should take into account his friendship with Black Widow "“ which makes us wonder: what exactly is the subtext of, "Are we still gonna be friends after this?" "Depends on how hard you hit me."

