"I just thought you should know," Steve says. "In case it changes anything." Sam claps him on the shoulder. "And we love you for it, man. But Tony's right. We'll come back to that."

Bucky's pretty sure Sam's statement's an expression of solidarity as well as redirecting that conversation to another time - Sam hadn't signed either, he remembers - but he can't focus on it beyond that, as Tony's last question's thrown his thoughts into a scatter of static. He stares at him in blank, stunned surprise.

"What?"