To which Steve arches his brows, arms crossed while he keeps his eyes on the horizon, just shortly before he finally offers his full attention to Usopp.

"Guess you haven't been paying much attention to the news."

He's referring to the huge and chaotic alien attempt to invade planet Earth, starting with New York, an invasion that he and the Avengers somehow managed to stop before it got completely out of their control. Loki, another alien, had been behind it, but he was returned to his home world by Thor. And all was well, destroyed property aside.

Of course, all of that would have to imply that they were both from the same plane of existence, which brings him to ask: "Where are you from?"