Steve shuts his mouth because of course he was going to interrupt and nods. He can live with that. He wouldn't ask any member of his team to lay down and die so Bucky won't have a single hair out of place should things go south. He's been violent with every one of them. There's no reason to think he won't be again.

He only hopes for a different outcome despite the fact their last meeting ended with bullets being pried out of him.

"Thank you." Steve collects his shield on his way out after Tony. He's as ready as he'll ever be to do this.