I'll check it out just based off the world Cameron created in the first film. Pandora is a cool location and has badass inhabitants with interesting flora and fauna. The original movie reminds me of Pocahontas, if that story was about Alien Cat people. It could very well suck and be just like other sequels with terrible dialogue a loose story and shitty production, but Cameron's track records suggests, at the very least, it will be visually stunning to watch. Worth it, imo.
I guess it depends on why you go see a movie. Visually stunning movies are great, and if it has a decent story that's just gravy. Marvel shits out some dumb secondary character storyline nobody asks for, but people still go see it. Why? It's entertaining to them. There are a lot of movies I will still watch, knowing full well that it isn't/wasn't the best version that could've been produced. Thor movies come to mind. The first two Thor movies were...something, Thor: Ragnrok had a great story and stopped taking itself so serious which made it a great movie to see and still watch today. The last Thor movie, Thor: Love and Thunder, sucked donkey balls and was nothing but a money grab to profit off of Ragnarok. 4 movies, one watchable over and over, and three I'll never see again.
This new Avatar could be the same, but I'll still go see it in the theatre just like the first movie.