Christopher Nolan says each one of his Dark Knight films falls under a different genre.
When recently talking to Total Film at 2018 Cannes Film Festival Nolan said Batman Begins is “hero’s journey”
The Dark Knight is a “crime movie” comparable to Mann’s Heat
and The Dark Knight Rises is a “war film”. Genres defined by adversaries: mentor Ra’s al Ghul, terrorist Joker & “militaristic Bane”.