Question: Which director inspired the Na'vi River Journey ride attraction at Disney's Animal Kingdom's Pandora which features floating mountains, alien wildlife and spans 12 acres?

Context articles: The Little Mermaid: Ariel's Undersea Adventure
Avatar Flight of Passage
Pandora – The World of Avatar
Avatar (2009 film)
Maharajah Jungle Trek
Kali River Rapids
Wildlife Express Train
Na'vi River Journey
Frozen Ever After
Horizons (Epcot)

The Little Mermaid: Ariel's Undersea Adventure (stylized The Little Mermaid ~ Ariel's Undersea Adventure) is a dark ride attraction based on the 1989 Disney animated film "The Little Mermaid", located in Paradise Pier at Disney California Adventure and in Fantasyland at Walt Disney World's Magic Kingdom, where it is titled Under the Sea: Journey of the Little Mermaid (stylized Under the Sea ~ Journey of the Little Mermaid).
 The ride opened on June 3, 2011 at Disney California Adventure, and on December 6, 2012 at Magic Kingdom.
"Avatar" Flight of Passage is a 3D augmented reality flying simulator attraction within Pandora – The World of "Avatar" at Disney's Animal Kingdom which opened on May 27, 2017.
 The attraction allows guests to take flight on a mountain Banshee and soar across the landscape of Pandora.
Pandora – The World of "Avatar" is a themed area inspired by James Cameron's "Avatar", located within Disney's Animal Kingdom theme park at the Walt Disney World Resort in Bay Lake, Florida, near Orlando.
 Set a generation after the events of the "Avatar" films, the area is based upon the fictional exoplanetary moon, Pandora, and features Pandora's floating mountains, alien wildlife, and bioluminescent plants.
 Spanning 12 acres , Pandora – The World of "Avatar" includes two major attractions, "Avatar" Flight of Passage and Na'vi River Journey, as well as retail and dining outlets.
Avatar, marketed as James Cameron's Avatar, is a 2009 American epic science fiction film directed, written, produced, and co-edited by James Cameron, and starring Sam Worthington, Zoe Saldana, Stephen Lang, Michelle Rodriguez, and Sigourney Weaver.
 The film is set in the mid-22nd century, when humans are colonizing Pandora, a lush habitable moon of a gas giant in the Alpha Centauri star system, in order to mine the mineral unobtanium, a room-temperature superconductor.
 The expansion of the mining colony threatens the continued existence of a local tribe of Na'vi – a humanoid species indigenous to Pandora.
 The film's title refers to a genetically engineered Na'vi body with the mind of a remotely located human that is used to interact with the natives of Pandora.
The Maharajah Jungle Trek is a themed wildlife trail attraction at Disney's Animal Kingdom theme park at the Walt Disney World Resort in Lake Buena Vista, Florida.
 It is in the Asia themed land, the Kingdom of Anandapur.
 It shares this area with the Kali River Rapids white water raft ride and the Expedition Everest runaway train rollercoaster.
Kali River Rapids is a river rapids ride at the Disney's Animal Kingdom theme park of the Walt Disney World resort, in the "Asia" area.
 It is themed as a rafting expedition along the Chakranadi River, courtesy of "Kali Rapids Expeditions".
 In keeping with Disney's Animal Kingdom's message of conservation and environmental protection, this attraction deals with illegal logging and habitat destruction.
The Wildlife Express Train is a narrow gauge rail transport attraction at Disney's Animal Kingdom in Walt Disney World.
 It’s route is 1.2 mi long and takes guests from Harambe Station in the Africa section to Conservation Station in the Rafiki's Planet Watch section.
 During the ride, portions of the Animal Kingdom backlot can be seen, including animal holding buildings for rhinos and elephants, among other animals as well as the roundhouse where the trains are stored.
 It takes about seven minutes to go from Harambe Station to Conservation Station and an additional five minutes to return.
 The railway is built to a narrow gauge, which is smaller than the currently used on East African railways.
 The full journey is a 1.2 mi round trip.
Na'vi River Journey is a dark ride attraction at Disney's Animal Kingdom's Pandora – The World of "Avatar".
 The ride takes guests through the Kasvapan River of Pandora from the 2009 film "Avatar", showcasing native animals and bioluminescent flora, with inclusion of Audio-animatronics.
Frozen Ever After is a dark water ride attraction in Epcot at the Walt Disney World Resort.
 Part of the Norway Pavilion of the park's World Showcase section, the attraction features scenes inspired by Disney's 2013 animated film "Frozen" as well as the 2015 animated short "Frozen Fever".
 It opened on June 21, 2016 and replaced the former Maelstrom attraction, utilizing the same ride vehicles and a similar track layout.
Horizons was the name of a dark ride attraction at Epcot (then known as EPCOT Center), a theme park at Walt Disney World in Bay Lake, Florida.
 Located on the eastern side of the "Future World" section of Epcot, the attraction used Disney's Omnimover conveyance system, which took guests past show scenes depicting visions of the future.
 It is believed to be the sequel to Walt Disney's Carousel of Progress, an attraction in Tomorrowland at Walt Disney World's Magic Kingdom.
 Horizons was the only attraction in "Future World" to showcase all of Epcot's "Future World" elements: communication, community interaction, energy, transportation, anatomy, physiology, along with man's relationship to the sea, land, air, and space.
 The attraction officially opened on October 1, 1983, as part of Phase II of Epcot.
 Horizons originally closed in December 1994, a little more than a year after General Electric had ended its sponsorship of the attraction.
 Horizons re-opened in December 1995 due to the closure of two other attractions that were down for refurbishment in "Future World", Universe of Energy and World of Motion.
 The attraction permanently closed on January 9, 1999, after which the attraction was dismantled and its structure demolished to make room for , a motion simulator thrill ride that opened on October 9, 2003.