"Maybe. Might be more complicated. If you only know about one Robin, I know who you mean -- and I know everyone he worked with. I don't recognize you. So either he's better at keeping secrets than I am at cracking them--" his tone of voice makes it clear that this is incredibly unlikely, in his opinion -- a bit of arrogance that sounds less like Batman and more like the Robin she knows -- "Or something unusual is going on. Given the island..."

Sort of a foregone conclusion.