I must be missing the valid reasons for disliking a theme park expansion on which we haven't seen a single piece of concept art or basic written overview.
I understand that some folks don't care for Avatar. Big deal! I'm quite certain there are people who are not fans of Aerosmith, Twilight Zone, Indiana Jones, Harry Potter, Spider-Man, Men in Black and others who still enjoy their respective theme park attractions.
I'm usually with you...but i don't think your stance or analogy holds up here...
Popularity of the original IP, characters, story, franchise - if you are using a third party established one - is a completely valid argument to express displeasure at a proposed project - in my opinion.
The harry potter expansion is a big success because the rowlings work was so well regarded/well received prior to the construction...and in that particular case - was a huge portion - as they really just rethemed the area and added one frontline attraction.
I'd say it's like the food network grading scale - you can receive 25 points each for:
Character (the ip - Avatarland is not scoring high on this - like it or not)
Technique (aka the technology used to create whatever it is they're going to build)
presentation (as in - what they actually build and how it looks)
taste (aka...staying power. is it a one and done like most of animal kingdom's existing sections...or can it be a significant, "core" draw not to just the park, but to WDW - a la fantasyland, tomorrowland or the world showcase)
if you say each "category" is worth 25 points...then probably - optimistically - the avatar land is down 10 points already.
which is my point. I haven't seen, heard, or been slightly interested in anything AVATAR since probably about its DVD release...and most didn't care then.
was that like november of 2009? to be honest...the next time i even thought about it was when i heard about the disney announcement last fall...and that was all of a minute and a half worth of concern.
This think is not star wars...its not harry potter...its not the super hero companies...hell, its not even star trek.
this "franchise" has not done a good job of remaining in the public consciousness so far. i think the original missed a lot of the target when it comes to franchise potential.
so it's not "haters"...its a legitimate argument and stance that cannot be ruled as foul.
my take