In an interview with Entertainment Weekly the film director of the Batman trilogy Christopher Nolan, reveals how The Lord of the Rings trilogy helped him to wrap up the epic series with ‘The Dark Knight Rises’.  He stated how difficult film trilogies tend to be, saying:

“There are very few very great third films, I think in some cases dissatisfaction with third films comes from the sheer exhaustion of the people making it”. He then went on to tell how Peter Jackson’s work on The Lord of the Rings acted as inspiration for his own crew “I will cop to this: ‘The Lord of the Rings’ trilogy was in the back of our minds the entire time we were making these.”