Here is the problem with what you are saying here: you have no basis of fact to say no one wants to visit Avatarland or Pandora or what ever Disney winds up calling it (probably something with 100 words in it, seems like that is how they name things today)...
The first Avatar did over $2 billion in business... That INCLUDES repeat viewings... So obviously there are fans out there... And even if Avatar 2 does half the business as the first movie, that is still $1 billion dollars... Of course no one should suspect Avatar 2 or 3 doing anywhere near $2 billion again... But that doesn't mean the movies will be utter failures...
And the argument that no one would go to Avatar-Pandora in DAK is baseless because Splash Mountain disproves that theory... I bet most, if not all of the regular guests who visit MK have no clue Splash Mountain is based on Song of the South... I will bet majority of the people who wait in the 100 minute long queues have never even seen Song of the South, but the ride is popular... As long as the land is greatly detailed and any rides that may come are great, the crowds will line up and visit this area of the park...
Providing this area ever gets built...