Although Christopher Nolan's Batman films are largely referred to as the Dark Knight trilogy, Nolan himself took each movie one at a time. When he was asked in a 2015 interview with The Hollywood Reporter if he'd known he was "signing up for multiple films" when he agreed to make 2005's "Batman Begins," Nolan replied, "No, not at all. I only had a deal to do the one film." He continued:
"Privately, ourselves, we started to put together a vague idea of where a second and third film were going, and then I immediately shot them down. I was like, 'You know what? You've got to put everything into the one movie and just try and make a great movie because you may not get this chance again.' [...] And then, when it succeeded, we were able to think about, 'OK, what would we do in a sequel?'"
"B

Slash Film

Rotten Tomatoes
LiveNOW from FOX Crime
CNN Business
Newsweek Top
AlterNet
The Texas Tribune Crime
Atlanta Black Star Entertainment
CNN Politics
Rolling Stone