While Avatar: Fire and Ash promises to introduce more villainous, morally questionable Navi, Quaritchs Avatar franchise return means these can be RDA collaborators instead of a second set of unrelated villains. Far from growing tiresome fast, the simplicity of the Avatar franchises storytelling is a major part of its appeal. In most blockbuster series, a straightforward story of good vs evil would need more nuance and complexity to keep viewers invested. However, the Avatar movies benefit from subverting the usual dynamic seen in alien invasion movies. Here, humans are the invaders and the heroes are the alien natives.
https://screenrant.com/avatar-3-quaritch-return-fire-na-vi-humans-team-up-villains/