What eveyone needs to realise is that by making a series of 'dark, serious' CB films, Nolan has achieved something that NONE of the Marvel films have done so far.
When Iron Man 1 came out, everyone's thoughts were 'What's the fight between him and Iron Monger gonna be like'
For Iron Man 2, it was War Machine and Ivanko, and how IM would beat him.
For TIH, it was the Hulk/Abomination fight.
For Thor and Captain America, it was the title characters vs. Loki / Red Skull.
For The Avengers, all everyone has thought is that ALL these characters would meet up in 1 film, but WHO were they fighting?
For TDKR, we have Bane and Catwoman.  BUT the  number 1 thought on everyone's minds is:  'Will Batman die?'
For every Marvel film including Avengers, the audience has always known that the superhero will prevail at the end.  Its the action and story that everyone's looking forward to.
For TDKR, Nolan has made a Superhero a flesh and blood character that is capable of dying and making the general audience (not just CB fans, EVERYONE) CARE about a fictional character.  
Think about that.  
It may have taken 26 more years, but Christopher Nolan has achieved ON FILM, what Frank Miller achieved in comic form in 1986.  THAT is the true achievement of BB/TDK/TDKR.