It is The Winter Soldier vs Team Iron Man in new Captain America: Civil War clip

Marvel’s Captain America: Civil War finds Steve Rogers leading the newly formed team of Avengers in their continued efforts to safeguard humanity. But after another incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability, headed by a governing body to oversee and direct the team. The new status quo fractures the Avengers, resulting in two camps—one led by Steve Rogers and his desire for the Avengers to remain free to defend humanity without government interference, and the other following Tony Stark’s surprising decision to support government oversight and accountability.

This new clip features The Winter Soldier, aka Bucky Barnes (Sebastian Stan) going up against Tony Stark (Robert Downey Jr.), Agent Carter (Emily VanCamp), Black Panther (Chadwick Boseman), and Black Widow (Scarlett Johansson)

Set for release in the UK on 29th April 2016 and the United States on May 6, 2016, “Captain America: Civil War” is directed by Anthony and Joe Russo (Marvel’s “Captain America: The Winter Soldier,” “Community”) from a screenplay by Christopher Markus & Stephen McFeely (“Captain America: The Winter Solider,” Marvel’s “Captain America: The First Avenger”).

Via Marvel