Avatar: Fire and Ash was announced at D23, the Disney fan convention. James Cameron revealed the film's official title during the Disney Entertainment Showcase in August 2024.
The announcement confirmed the name of the third Avatar film after years in which it was commonly referred to as Avatar 3 or by earlier working titles. Cameron explained that “fire” suggested hatred, anger, and violence, while “ash” represented grief and loss—the aftermath left by that cycle.
D23 is closely associated with major Disney announcements, previews, and presentations involving the company's film studios, parks, television brands, and franchises. Because Avatar is distributed by Disney-owned 20th Century Studios, the title reveal fit naturally within the convention's showcase.
CinemaCon is an important theater-industry event, Comic-Con is a broader pop-culture convention, and Star Wars Celebration focuses on the Star Wars franchise. None of those was the venue for this title announcement.