Considering the fact that Avatar is the highest grossing movie of all-time, it’s more than a little baffling to think that it’s now been six years since the first instalment was released.

The sequels are of course still in development, with the first of those tentatively expected to be released in 2017. Now, director James Cameron has finally offered an update on the status of that trilogy, revealing that things are still moving forward at a fairly steady pace.

“I’m in the process of doing another pass through all three scripts right now,” he said of where things currently stand with the Avatar franchise. “Just refining. That’s in parallel with the design process. The design process is very mature at this point. We’ve been designing for about a year and a half. All the characters, settings and creatures are all pretty much [set].”

Sam Worthington, Zoe Saldana, Stephen Lang, and Sigourney Weaver are all expected to return for Avatar 2, and expectations are already high that the sequel will perform just as well. However, the prospect of not grossing as much as $2 billion doesn’t face Cameron.

“You have to challenge yourself,” he said. “Obviously, expectations are going to be very high on these films, especially on ‘Avatar 2,’ to make sure it wasn’t just some big fluke the first time. So we’ve got to deliver. I’ve created a nice rod for my own back, so they say.”

Was it a fluke? That obviously remains to be seen, and we’ll find out a few years from now…