Following an impressive summer at the box office, Mad Max: Fury Road director George Miller and Warner Bros. are currently in talks to decide which of the film's two sequels should be produced first.

Sitting down for an interview with Top Gear, Miller confirmed there were two Fury Road scripts floating around that Warner Bros. was interested in producing.

"We ended up with two scripts, without really trying," Miller said.

"We're talking to the studio [Warner Bros] about it as we speak, but which one of the two stories will happen next, I'm not so sure."

While the unprecedented $300 million international box office success of Fury Road paved the way for Warner Bros. to even consider financing two sequels, Miller said the scripts have been passed around since 2001.

"We went to shoot with Mel Gibson back in 2001, but then 9/11 happened, and the American dollar collapsed against the Australian dollar close to 30 per cent, so we lost that amount of budget overnight," he told the magazine.

"We were then rained out of Australia. The desert rained for the first time in 15 years, and we ended up in South West Africa, Namibia."

Interestingly enough, the version of Fury Road Miller was prepared to shoot in Australia (his first Mad Max movie after directing the animated penguin feature Happy Feet) did not focus entirely on the backstories of characters like Max or Furiosa. Instead, it heavily depicted the development and history of the infamous apocalyptic vehicles so crucial to the franchise.

"We had dug down deep into the backstory, not only of the characters, but of every vehicle. How the steering wheels became religious artifacts and things like that."

Still, Miller admitted the eight-month process of shooting Fury Road was incredibly draining and would only return to the series after he had time to work on a less strenuous feature.

Mad Max: Fury Road is currently available to purchase on DVD or Blu-Ray, and can be downloaded on iTunes.