Just for the record, as we're all theme park fans I think we all want Pandora to be incredible. Just because Disney have thrown more dollar at it than Diagon Alley doesn't mean it will be better than it as it's entirely dependant on the IP that it relates to.
There is no doubt about it that Uni struck gold with HP, there is a story, people can relate to it, it allows the general public to fantasise and picture them in that world. For me nothing about Avatar strikes me as something that will change the theme park world for the better. My point is if I threw $1b at imagineers and told them to create an Anchorman land for example. Would it bring in some people? Probably a few mentalists yes. But would it be worth the outlay, not a chance.
Also, doubleJ, nothing personal aimed at you, appreciate you're passionate about it but there is a point where Dis are paying too much for the ROI they will get.