I cited a few things, sure. My intent was never solely to prove anyone wrong or anything, I just used my unique insight as a media journalist and avid pop-culture congoer to give some reasons i felt as though Avatar was "flash-in-the-pan", as a dedicated fandom has all but died out in the past couple years. I've seen it happen in front of my eyes.
Regardles, Cars land is a very valid point to bring up. It's received a fair share of criticism, mostly because the Car movies are widely seen as the absolute lowest point in terms of quality for Pixar. While it may not be ideal, the merchandising and theming value of Cars mostly makes up for it in my opinion. I'm not a fan of Cars at all, but honestly even the Cars section of Art of Animation had me extremely impressed.
I'm not saying i won't enjoy Avatar land. I'm sure i will enjoy it, and I'm sure we'll get some cool Imagineering out of it as well. My whole assertion, from the beginning, has been that Disney has been angling this as a "big deal", something to help fight Harry Potter at USO, when in reality the market for Avatar doesn't exist outside of "that was a cool movie a few years ago".
I guess, in the end, for me at least, it comes down to what i see as relevant in pop culture. At my job, i see thousands of kids a day. Almost 1 in 10 kids has some sort of "Cars" merchandise on them or their clothes. Other kids have Star Wars, Superheroes,Princesses, Harry Potter, etc. If Disney was really serious about this expansion, they would buck up and deliver something that would use a preexisting fandom to build up hype and drive sales, instead of picking a franchise that has little to no buzz around it at this point and hoping that people will come based on the memory of a movie that people don't seem to care about anymore.