A new trailer for "Avatar: Fire and Ash" has been released, revealing a dark backstory for a group known as the Ash People and showing the Sullys preparing for war. The trailer also appears to unveil the origins of the Fire Na'vi and tease an epic battle between clans. However, some outlets seem to be discussing unrelated topics, such as "Avengers: Doomsday", creating some confusion about what the trailer actually shows.