Avatar earned $2.79 billion back in 2009 off a reported production budget of around $237 million, per Box Office Mojo. Well, the coming sequels will evidently cost over $1 billion, according to Deadline. Alright, did they actually build Pandora? That budget sounds absolutely bonkers. Now the numbers are not specific about how many sequels are being lumped into that number, but James Cameron has four planned out.