If you are fine with watching through 3 hours of good CGI with nothing else to offer, you may like this.
I was annoyed after watching this movie. How can they be allowed to waste all those resources on a plot this one dimensional, boring and illogical? Basically the humans came back and they need to populate Pandora to save the human race (so they say). Still, when Jake Sully runs away, they don't give a damn about anything other than Jake and tried to find him. In summary, they bring a whole army to Pandora to colonize it, but then suddenly all they need to do is find Jake and they are satisfied? He goes of course to a water village. Then it is conveniently revealed that now the humans are not even after minerals, they are after whale brains, and no one is at all interested in minerals anymore. It's all about Jake and whale brains... I also thought it was strange that Jake ran away in the first place. The humans intended to colonize the whole planet (they said so in the beginning but it changed later without telling the audience why it changed), so him running away would not solve anything for him, and he must have known that.
The characters are also really shallow. Jake is the only one that really sticks out, but his son's are actually the main characters in the film. I actually don't even remember their names. The pacing is also really bad, they cut the scenes in really strange ways.
I could rant about this movie for hours. It is not a good movie, trust me. Don't pay to watch it on cinema, wait until you can stream it.
The movie is also quite racist. All humans were of course white, because they are supposed to be evil colonizers? I'm not 100% certain, but I am getting a strong African and Indian vibe from the navi people, at least I think they were inspired from some form of tribal community. Still they act a bit like savages sometimes, especially when they got angry, and it feels a bit wrong to portray different people of humans with this kind of contrast. I am not sure of course about this, but this is how it felt like for me when I saw the movie.