Scott Lang/Ant-Man
Scott Lang/Ant-Man (Paul Rudd) is another character that has seen the big picture, albeit at the other end of the scale. While Iron Man saw the vulnerability of Planet Earth through a space portal, Ant-Man saw the scope of universal reality when he briefly visited the Quantum Realm in Ant-Man. Given that the Captain America: Civil War trailer places Ant-Man at the side of Captain America in battle, this big picture glimpse seems to have had the opposite effect for him, than it did for Iron Man, though.
[zergpaid]As a character that led his own movie, Ant-Man is seen to be a man that is unable to accept authority in his life. He is, when first we meet him, in jail for breaking the law. As a renowned thief, he has spent his days living outside the rules, and it takes almost the length of a whole movie for him to accept Dr Hank Pym as an authority figure – let alone S.H.I.E.L.D. and the government. In this way, it is no great logical leap to set Ant-Man on the side of Captain America and freedom from official interference.