First, let me say that I am a fan of the movie. It is technically brilliant and visually stunning.
However, my problem with the creation of a land at DAK is the lack of staying power. The film was huge when it was released but I think it is more of a fad than culturally significant. If this is supposed to be Disney's answer to Potter at Universal, it is a very poor choice. Potter has a hugely popular book series as well as a brilliant movie franchise to draw fans from. The Potter fans span generations, parent's, children and even grand parent's know the stories and films. I personally read the stories with my now ,college freshman daughter, and will read them to my two year old at the appropriate age because of the great storytelling they have.
Avatar on the other hand is just one film.(I know, there are planned sequels) and is already 3 years old with no new film due for release in the next year. I am certain that my 2 year old will not know Avatar is. It seems like a waste of hundreds of millions of dollars for a land that will be old and passť by the time it would schedule to open. I know that DAK needs something(so does DHS) but Disney is wrong to hitch it's wagon to Avatar. If you agree with me, what land would you suggest that would stand the test of time.