[Nero does not outright say "what on earth are you talking about?" It is at least mildly written all over his face, though.

He lets Vergil ramble for a moment, then catches the question and tries to remember the movie. He's seen it more recently than on his handheld television but it was still a while ago.]

Uh... no. I don't think there are any titans, come to think of it. [A beat.] It's a good movie though. We should watch it sometime.

[Then he cracks a sly grin, upside-down from his spot leaning his head on Vergil's leg.] You can tell me all the ways it's not the same as the book.