In a post on the official “Avatar” X account, it was revealed that the first trailer for James Cameron’s “Avatar” threequel will screen exclusively in theaters before showings of Marvel’s “Fantastic Four.”

Right from the outset, it's clear that "Fire and Ash" will be the most intense chapter in the "Avatar" saga yet. For the first time, we see hostility amongst the Na'vi clans, with Jake Sully (Sam Worthington) and the oceanic Metkayina clan drawn into a conflict with the Mangkwan clan, or Ash People, as they're also known.