James Cameron confirms more Avatar sequels due to successful box office earnings.
Avatar 3 is near completion, and 4 and 5 are already written.
Avatar 2 earns over $1.5 billion worldwide, with positive reviews.
The original cast, including Sam Worthington and Zoe Saldana, returns for the sequel.
Avatar 3 introduces "Ash people," a new perspective on Pandora's natives.
No details about Avatar 3 released yet by Cameron.
The film earned $1 billion in less than two weeks after release.
Avatar 2 starts a saga to be told in multiple films.