Now we know fists are going to fly, and one talented artists named "Butcher Billy" took the liberty of designing fanart of The Star-Spangled Avenger duking it out with the Armored Avenger - The Dark Knight Returns style! Instead of Superman and Batman, it's Cap and Iron Man in these stellar recreations... With both switching it up and doing signature poses of Bats taking down Supes with a punch or kick.
Above is Cap (as Batman) taking down Iron Man (as Supes).
And now the opposite - Iron Man (as Bats) taking down Cap (as Supes) with a KICK.
Lovely stuff, as seen in Comic Book.com, and you can check more of Butcher Billy's stuff as Behance!