Avatar director James Cameron has been unable to stop gushing about the fourth installment of the film franchise, despite the fact that the second and third films are still in the works, according to MTV.

According to Cameron, the script is still in development within his mind, the director intends for the film to be a prequel to the rest of the series. He told MTV that the flick will will “focus on what went wrong with the humans and the Na’vi,” leading to the first film.

The filmmaker called the process of making the first film “a hideously complex process,” and that he has hopes the subsequent films will follow a much smoother path.