“Andy Park has been releasing a lot of very cool concept art from Captain America: Civil War, and the latest features a new look at the 
battle between Iron Man and The Winter Soldier. Intent on killing Bucky after learning that we was responsible for the murder of Howard and Maria Stark, this piece features Tony delivering what he’s clearly hoping will be a killing blow to Steve Rogers’ best friend.
The emotional battle between the three was a great way to wrap up the movie, and with The Winter Soldier expected to return in Avengers: Infinity War, it’s going to be very interesting see how future interactions between him and Iron Man are handled. A rematch between the two is possible, but Earth’s Mightiest Heroes will obviously have their hands full with the impending arrival of Thanos… “
Source: ComicBookMovie
