James Cameron's third Avatar movie is turning the rules upside down, introducing a nefarious Na'vi clan as the human invaders go all-out.

Welcome back to Pandora. Disney just released the first trailer for Avatar: Fire and Ash, the third installment in James Cameron’s epic sci-fi saga. Set on the alien moon of Pandora, the series follows the Na’vi as they defend their homeland from human invaders who are stripping it of its natural resources.

The follow-up to 'The Way of Water' teases a spectacular epic that includes volcano fights, family tragedy and intense action. Fan reactions are over the top: "Yup, another billion to James Cameron."