Cinema Geekly wrote:
The real argument is why did they go with the Henri Ducard fake identity gimmick? Clearly that is why they never reveled the real villains name in trailers and such even though it was a badly kept secret.
I didn't know who Henri Ducard or Ras Al Ghul was, and the fake identity gimmick was a general theme in the film. Theatrics and deception, and everlasting symbols that cannot be killed. Wayne has a fake identity, his master has one as well, and both Batman and Ras Al Ghul are those everlasting symbols.
But with nuKhan, it's just one mystery for the sake of mystery. It doesn't even have a purpose in the film, it has only a purpose on the other side of the 4th wall, to play with the anticipation during promotion.