The whole movie feels like an advert for a CGI company. The characters and writing lack any depth and getting through the almost 3 hour runtime is a bore.

Like the first movie, Avatar 2 feels more like a techical showcase than an actual movie. The main characters are bland and lack any persona or motivation for their actions. Over 70% of the film consists of fill or environmental shots that do not develop the story anywhere.

Like others have noted, the world-building is good but not enough to make the film worth three hours of sleeping in the cinema. I can only recommend this if you have a good patience and are a big fan of the first movie.