Will Avatar 4 End on a Cliffhanger?

Yes — James Cameron and multiple coverage say Avatar: Fire and Ash does not end on a major cliffhanger and largely resolves the original trilogy’s main storylines, meaning Avatar 4 is not guaranteed to be set up by a cliffhanger ending in part 3[2][3][5].

Context and supporting details
– Cameron described Fire and Ash as the conclusion of the original saga and said it resolves the core story so the franchise could reasonably stop there if future films are not commercially justified[2][3].
– Press coverage and film analysis note the movie wraps up many plot threads — several principal character arcs reach clear endpoints and there is no big post-credits tease that forces a fourth film[1][2].
– At the same time, journalists and outlets point out there are a few open threads and character conditions (for example, characters who appear to die but could return, and developments like a human being able to breathe on Pandora) that leave space for sequels if the studio wants to continue the franchise[1][4].
– Cameron has planned further movies (reports say work has started on Avatar 4 and some shooting has occurred), but he has also stated that sequels beyond Fire and Ash depend on the commercial success of the new film and could be cancelled or wrapped up by other means such as a book if needed[5][3].
– Trade reporting and reviews present a consistent picture: Fire and Ash provides closure for the original saga while intentionally leaving a few possibilities open to support future installments if produced[1][2][5].

What this means for Avatar 4
– If studios commission Avatar 4, filmmakers have narrative room to continue the story because of surviving characters and unresolved elements noted by critics and reporters[4][1].
– If Fire and Ash underperforms, Cameron has publicly said he is prepared to end the series there and close remaining threads in another format, so the film was designed not to require a sequel to feel complete[3][5].

Sources
https://www.looper.com/2051088/avatar-fire-and-ash-ending-explained/
https://screenrant.com/avatar-fire-and-ash-saga-end-james-cameron-explain/
https://www.thefilmnewsblitz.com/news/film-news-james-cameron-prepared-to-end-avatar-franchise-after-fire-and-ash
https://www.digitalspy.com/movies/a69794487/avatar-4/
https://www.slashfilm.com/2037498/james-cameron-avatar-franchise-future-fire-and-ash-not-profitable/