With the outstanding success of the 'Avatar' film franchise, James Cameron is planning to add more than one movie to the series, and has recently revealed some details about the forthcoming film.

It is reported that Pandora will be greatly explored in the sequel. However, the director did not say how much of the scenes will be done under water.

Cameron told Nightline that he's the one doing the writing for the second and the third film installations, "['Avatar 2'] is on Pandora. Well, I'm really writing the second and third films together, so it completes a kinda three film story arc. And we will see the oceans of Pandora, which we haven't seen at all and that's an ecosystem that I'm dying to start designing because it's going to look spectacular," said Cameron.

He also said that if the first movie focused on the Earth, the second one will tackle most of water issues, "because we have a planet that's a blue planet."

"From a distance, you look at it, the Earth is a lot more blue than it is, you know brown, the land mass. We're making the oceans unsurvivable for a lot of the species right now. For a lot or reasons. It's just a way to focus a little energy in that direction," shared Cameron.

Regarding the tone and style of the sequel, he said it will be a "continuation of the same thing."

"I want people to feel that same sense of excitement about that world [Pandora]. You know, the fictional Na'vi people and I want them to feel that excitement of discovery of a new world that they're going to see things that they haven't imagined. All that sort of the perk package of the first movie is still going to be there. And the themes will be there and be played out in a way that I think people can accept... I'm not going to become more strident. I'm not going to say, 'well, we got away with this much environmental content in the first movie, now there's double.' Because I think that would be a mistake. It has to be entertainment first and foremost," he said.

'Avatar 2' is gearing up to hit U.S. cinemas around the 2014 Christmas season, which will be followed by an 'Avatar 3' in 2015.