You know, I do remember there being a kerfuffle about Christian Bale playing Batman when he first got cast and how Batman is an American comic book character, but I have to think that was at least partly an excuse because some people always seem to get up in arms about anyone getting cast as Batman, but I will say there actually were a lot of British actors playing American in The Dark Knight Rises. But it did come up again, because for the next movie Heath Ledger was Joker and at around the same time Andrew Garfield was Spider-Man. It is kind of interesting how often they go outside the US when casting American comic book characters.