"I don’t really think of films in terms of light and dark..." Nolan said when questioned by British newspaper The Telegraph about the tone of Batman Begins and The Dark Knight.
He was quick to deny that he's a 'dark' film maker however, "...and I’m often surprised with the two Batman films we have made, for example, that people would think of them as having a dark tone, because to me they’re actually very optimistic and are full of emotionally positive things as well as negative things."
As for how work is coming along on his reboot of Superman, tentatively titled The Man of Steel, he wasnt prepared to reveal all that much about the project: "We’re working on the script but someone else will direct. I can’t really say much more."
As for how he intends to make sure both that and Batman 3 are a success, Nolan remained tight lipped regarding the rumours that Catwoman and the Riddler will appear but said this, "Batman and Superman are very different characters but they’re both iconic and elemental. Finding the right story for them both is the key. That’s the dream!"