Star Wars franchise: 27 billion in total sales with around 17 of that associated with merchandise (not adjusted for inflation).
Harry Potter franchise: 21 billion on total sales with about 7 billion in merchandise sales thus far. No telling what the end result will be with the goings on at Universal.
The Walt Disney company: 37 billion in merchandising sales just in 2011. I've purposely left off the last couple of years to keep a distinction between legacy Disney and the acquisition of LucasArts.
Avatar: 2.8 billion in ticket sales with 356 million in DVD/Blu-ray sales.
I personally liked Avatar, but the inflated cost of an IMAX/3D ticket helped propel the film into the stratosphere. Not that that's a bad thing. In fact, more power to Fox and Cameron. However not every film made has the benefit of those inflated costs. Personally I prefer to look at the total number of tickets sold to determine the true popularity of a film.
That said, there's no way I'd even consider Avatar close in comparison to the other two in terms of staying power and the ability to make a theme park money. So why would Disney seek out a single film with, at best, three more films coming down the line? Why not tap into their own material that has so much more merchandising potential? There is no logic in this approach other than Fox and Cameron did something financially related for Disney.
http://mrob.com/pub/film-video/topadj.html
should do the trick for you...now keep in mind this is only domestic, if world wide was added in it would be around 2 or 3
also note no movie after 2000 is on the list which lends to my point that netflix and red box have changed movie goers, not as many people go to movies as they used to..also anti-avatar folks always bring up inflation and 3d but i ve never heard anyone say the same thing in regards to frozen, avengers, or GOTG even though they had similar %'s of people seeing them in 3 D
i dont know why star wars always gets brought up to me on this subject i never said it was bigger than star wars....im totally for a star wars expansion and loved the WWOHP but this has nothing to do with those
they wanted to extend hours in DAK and i think picked the perfect IP to do just that...a night time land visually stunning
all movies go up and then back down when nothing new comes out....check out google trends for this
when the next avatar films come out they be huge again make over a billion each right in time for the DAK opening