Avatar 2 Movie cast Sigourney Weaver, who plays the scientist Grace Augustine in the first movie and died during the period of the film is said to be back in the sequel to play and "transform" into a new character.

The actress confirmed that she would still be in the cast of the upcoming sequels of the movie but sworn to secrecy about the character and her role in the new film.

"I can't talk about it, but my part is a little different in each one," she said in an interview with Vulture Magazine. "I'll transform somewhat."

Director James Cameron has been preparing for the sequel, particularly the second, third and fourth part of the film, to make it more mind-blowing and work faster based on the amount of development, in terms of computer graphics is concerned, to make the second movie of the series exceed the expectations of the audiences.

"The first film... took almost four years to make. We expect to be able to accelerate the process quite a bit, because we've improved a lot of the software and the computer graphics tools, and we've been working very closely with Weta Digital down here in New Zealand developing a whole new suite of tools to speed up the process."

It was recently announced by James Cameron that scripts for the next three sequels of the Avatar series will be done in the next six weeks.

"The second, third, and fourth films all go into production simultaneously," he wrote on a Reddit Ask Me Anything session last weekend. "They're essentially all in pre-production now because we are designing creatures, settings, and characters that span all three films. And we should be finished with all three scripts within the next, I would say, six weeks."

Cameron provided a sneak peak in an interview that there would be new worlds and new characters that would be introduced in the second installation of the Avatar series.

"We're still in the early stages. Right now we're developing the software. I'm writing the scripts. We're designing all the creatures and characters and the settings, and so on. So, I'm not actually directing yet, but I'm doing all the other creative processes that lead up to that. It's going very well. I think it's going to be spectacular. You'll see new worlds, new habitats, new cultures. The primary conflict between the human view kind of dominating nature and the Na'vi view of being integrated into nature is the same, but it manifests itself in very different ways," he said in an RTL interview.

Meanwhile, director of Titanic and first two installations of the Terminator series also expressed his enthusiasm with 3D as he wants the whole series to be shown in 3D.

"I believe all movies should be made in 3-D, forever, but the projection needs to be better and brighter," he wrote during his AMA. "I want people to see in the movie theaters what I am seeing in my perfectly calibrated screening room and people aren't seeing that. Larger formats. I'd love to see screens get bigger."

Avatar and its sequels are expected to be made at the same time and is expected to be out in the cinema from 2016 through 2018.

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