Sony's new God of War for PS4 brings the franchise to the world of Norse mythology, moving on from the Greek era of previous instalments in the series. The next games in the series could take place in the Egyptian and Mayan eras, and others, director Cory Barlog says.

"The Greek games were the Greek era of God of War," Barlog said in the latest issue of Game Informer. "Moving on, the next mythological belief system he interacts with became the Norse era of God of War. But we may end up going on to the Egyptian era and the Mayan era and so on and so forth."

Given that 2018's God of War isn't out yet, you should not expect to hear any official details on the next game--if there is one--for some time. Sony Santa Monica boss Shannon Studstill added that there was much discussion internally at Sony about if the God of War series needed more time to rest following the underwhelming God of War: Ascension.

"A lot of people throughout the organization wanted [God of War] to sleep and rest," Studstill said. Barlog said it was an uphill battle to make a new God of War. "Even the first pitches I gave, there was that, 'You've really got to convince me that we should do another one,'" he said.

Barlog went on to say that God of War as a franchise needs to be bigger than it currently is, rising to the level of Uncharted or Assassin's Creed when it comes to popularity. "To me, that was important, because I really think we needed to have a much bigger audience,” Barlog says. "I want this to reach a lot of people; I want this to be on the level of the Uncharteds and the Assassin's Creeds. We want to grow this franchise big time."

Also in the interview, Studstill talked about how the God of War series started to fall off the map, so the team looked at a new game as a way to reinvigorate the franchise.

"What became apparent to me was that we were watching this franchise wane a bit," Studstill said. "It was getting old. The storyline with Kratos being the hardcore badass--I think people were starting to say, 'What's next?’ I felt like, in order to reinvent, we really needed to turn a lot of things around."

Game Informer's full story is incredibly in-depth and detailed, covering numerous other aspects of the game including its story and new weapons. You can find out how to purchase the issue here. In other news, we recently learned that the campaign will take you as long as 35 hours to complete.

God of War is currently scheduled for release sometime in 2018. The game's latest trailer was released during Paris Games Week, and it shows off some father-son combat; you can watch it in the embed above.