Most dislike or have never seen??? huh..
Avatar is the highest grossing film, of all time. Not even the Force Awakens is close, which is the 3rd closest film of all time. Just to put Avatar's success in perspective...
1. Avatar 2.78 B
2. Titanic 2.2 B
3. Force Awakens 2.06 B
4. Jurassic World 1.67 B
5. Avengers 1.51 B
http://www.the-numbers.com/box-office-records/worldwide/all-movies/cumulative/all-time
Avatar almost did twice as much as the number 5 grossing film of all time. Somebody saw the movie, lol. Now granted Avatar had incredible numbers, partially because of the 3d boom. If you look at ticket sales Avatar isn't nearly as impressive yet still better than almost every Disney Film that represented in the parks, except a few classics and of course Star Wars.
24. Avatar sold 78.3 Million tickets (2.8 billion in sales)
Let's compare that to other Disney IP lands that got built.. say Cars (has been a huge success)
228. Cars sold 36 million tickets (461 mil)
nr. Cars 2 sold 23.2 million tickets (560 mil)
Avatar 78.3 vs Cars 1&2 59.2 = Avatar sold 19.1 million more tickets sold ( 1 movie vs 2 movies)
Avatar 2.8 Bil vs Cars 1&2 1.02 Bil = Avatar sold 1.78 Billion more in sales ( 1 movie vs 2 movies)
https://mrob.com/pub/film-video/topadj.html
Of course ahead of all those films in ticket sales are many Star Wars Films, Disney classics such as, Lion King, Snow White, 101 Dalmatians, Mary Poppins, Fantasia, Jungle Book, Indiana Jones all of which are grossly under represented for the most part, until SWL comes online. You'd think Disney would give Lion King some more attention.. number 10 in ticket sales and close to 1 billion in sales. Off all Disney IP, it's grossly underused.
At the end of the day, Avatar seems like a finically sound investment no mater how you look at it. If Cars, with almost a 3rd the amount of monetary value was able to be the best themed land with huge guest satisfaction ratings, then I see no reason why an equally design and funded Avatar inspired Pandora land wouldn't be just as big if not bigger. The only thing that Cars has going on for it that Avatar doesn't have is a Merchandise advantage... but that is just an assumption at this point.