Question: How much did the Avatar section of Disney Land cost to create?
About the article "Disney's Animal Kingdom", section "Avatar: World of Pandora".

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In Spring 2011, James Cameron was approached by The Walt Disney Company's chief executive officer, Bob Iger, regarding the possibility of Avatar-themed attractions in Walt Disney Parks & Resorts.
On September 17, 2011, a long-term, exclusivity deal was signed between Disney, James Cameron's Lightstorm Entertainment and 20th Century Fox.
This deal was officially announced to the public on September 20, 2011, on the Disney Parks Blog.
The highlight of the announcement was that Disney's Animal Kingdom would receive a new themed area dubbed "Avatar Land".
The area is set to cost approximately $500 million.
Construction began in January of 2014, with a planned opening date between 3 and 5 years later.
The deal could see Avatar attractions added to other Disney theme parks in the future, however, there are no immediate plans to do so. 
In September 2011, Walt Disney Parks and Resorts announced plans to partner with filmmaker James Cameron, his Lightstorm Entertainment production company, and Fox Filmed Entertainment to develop attractions based on Cameron's "Avatar" film franchise exclusively for Disney theme parks.
The first installation is planned for Disney's Animal Kingdom in the form of an "Avatar"-based section of the park.
While no specifics were announced, the new area was described as being several acres in size and costing an estimated $400 million to build, a scale similar to Cars Land at Disney California Adventure Park in California.
Components from the upcoming second and third films in the "Avatar" series will be featured, along with new designs not seen in any of the films.
Construction began on January 10, 2014.
Originally, the land the Art of Animation Resort occupies was planned to be part of Disney's Pop Century Resort as part of the "Legendary Years" section.
Several buildings were constructed for these plans, some even to the point of adding decorative details.
While one half of Pop Century (the "Classic Years") opened in 2003, the other half was left abandoned following the tourism halt after the September 11 attacks on the United States.
Disney started to prepare the land for the resort in January 2010, and construction began in the summer of that year.
At the time of this announcement on May 12, 2010, Disney did not say how much construction is expecting to cost, but it was mentioned that approximately 800 jobs will be produced.
When the "Legendary Years" buildings were first being made, a bridge named the Generation Gap Bridge was constructed to connect both parts of Pop Century and made them accessible to each other.
The bridge connects Pop Century to the "Finding Nemo" section of the Art of Animation Resort. 
Walt Disney determined that Florida provided the ideal place to set up his new East Coast venue.
However, Walt did not want to repeat himself by building another Disneyland.
He wanted to create something entirely different: a community for people not just to play in, but to live in as well.
This was the beginning of EPCOT.
Through various dummy corporations, Walt Disney purchased of Florida swampland (twice the size of Manhattan Island) located between the cities of Orlando and Kissimmee (see Reedy Creek Improvement District).
This land would eventually become the Walt Disney World Resort.
"Here in Florida we've enjoyed something we've never enjoyed at Disneyland: the blessing of size.
There's enough land here to hold all the ideas and plans we could possibly imagine", Walt Disney said, referring to the fact that he had little control over the surrounding area of Disneyland.
Disney also petitioned with the State of Florida Legislature to give Walt Disney Productions municipal jurisdiction over the land they had acquired.
This was to make sure that Walt Disney could have full control over every part of the property, even how the buildings were constructed.
Walt was planning new ideas in urban living and did not want the government to interfere.
This was the beginning of the Reedy Creek Improvement District. 
"Avatar Land" is designed by Walt Disney Imagineering with "Avatar" producers James Cameron and Jon Landau also providing creative assistance.
The area will be an immersive world based upon the fictional exoplanetary moon, Pandora and will include Pandora's floating mountains and bioluminescent plants.
"Avatar Land" is expected to span several acres and will feature multiple rides and attractions, entertainment, audio-animatronics, 3-D holograms as well as retail, food and beverage outlets.
Although exact details of the attractions have not yet been announced or even devised, James Cameron confirmed that a flying attraction featuring "3-D projections and creature designs that were cut from the original film" was a concept on the drawing board for the area.
Avatar Land will include elements from the original "Avatar" film as well as its three, yet-to-be-released sequels.