With Civil War brewing on the Marvel movie horizon, we're gearing up to watch Iron Man and Captain America duke it out. And here, you can see them throwing punches in the style of Batman and Superman's fight from Frank Miller's The Dark Knight Returns.

Artist Butcher Billy cooked up this mashup of The Dark Knight Returns and Marvel's Civil War. He lets both Cap and Iron Man take on the Batman role, with Steve getting in a solid punch, echoing this panel:

And Tony giving Cap a swift kick to the chin:

Much like Batman did to Superman:

You can see more of Butcher Billy's artwork at Behance and Tumblr, and check out his Society6 and Redbubble shops.

Marvel's The Dark Knight Civil War by Butcher Billy [Behance via GeekTyrant]