Question: What genre of movie do Alita: Battle Angel and Avatar share?

Context articles: List of Battle Angel Alita characters
Battle Angel (OVA)
Gunnm: Mars Chronicle
Avatar (2009 film)
Battle Angel Alita
Yukito Kishiro
Caerula Sanguis
Battle Angel Alita: Last Order
Alita: Battle Angel
Gunnm: Martian Memory

The Battle Angel Alita manga series features a cast of characters designed by Yukito Kishiro.
 The series takes place around the city of Scrapyard where residents, of whom many are heavily modified by cybernetics to better cope with the hard life, are forced to make a living.
Battle Angel, known in Japan as Gunnm (銃夢 , Ganmu ) , is an original video animation based on the "Battle Angel Alita" manga by Yukito Kishiro.
 The OVA comprises two episodes, "Rusty Angel" and "Tears Sign", that serve as a compressed preview for the manga.
 They correspond respectively to volumes 1 and 2 of the manga, with some differences.
 According to Kishiro, only two episodes were originally planned.
 At the time, he was too busy with the manga "to review the plan cooly ["sic"] ", nor was he serious about an anime adaptation.
 There are no plans to revive the anime.
Gunnm: Mars Chronicle (銃夢火星戦記 , Ganmu Kasei Senki , lit.
 "Gunnm: The Martian War Chronicles") is a Japanese manga series written by Yukito Kishiro as a continuation of his "Battle Angel Alita" series.
 A sequel to "", the series is the "final chapter" in the "Battle Angel Alita" franchise.
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.
Battle Angel Alita, known in Japan as Gunnm (銃夢 , Ganmu , literally "gun dream") , is a manga series created by Yukito Kishiro in 1990 and originally published in Shueisha's "Business Jump" magazine.
 Two of the nine-volume comics were adapted into two anime original video animation episodes titled "Battle Angel" for North American release by ADV Films and the UK and Australian release by Manga Entertainment.
 Manga Entertainment also dubbed "Battle Angel Alita" into English.
 A live-action film adaptation titled "" is scheduled for release on July 20, 2018.
Yukito Kishiro (木城 ゆきと , Kishiro Yukito , born March 20, 1967, Ōta, Tokyo) is a Japanese manga artist.
 He is best known for "Battle Angel Alita".
 He began his career at age 17, with his debut manga, "Kikai", in the "Weekly Shonen Sunday".
Caerula Sanguis (カエルラ・サングウィス , Kaerura Sanguwisu , Latin for "blue blood") is a fictional character in the "" manga by Yukito Kishiro, the sequel to "Battle Angel Alita".
 Caerula is one of several "Last Order" characters adapted from fan submissions that were solicited by Kishiro from his readers for character ideas.
 She is based a design called “Blue” by tfng, and the color blue is a recurring theme in the various aliases she has adopted.
 Formerly known as Vilma Fachiri, Caerula is first introduced as the Chairman of the Stellar Nursery Society, a small faction that operates within the main asteroid belt.
 However, she turns out to have a much longer history and background going back more than 700 years that parallel the creation of the current world within which the "Battle Angel Alita" universe is set, but was not revealed in the original manga series.
 As one reviewer notes, "in a very real sense Caerula's story is also the foundation of the present...her actions in the past played an instrumental role in bringing about the state of affairs that exists in Alita's current time."
Battle Angel Alita: Last Order, known in Japan as Gunnm: Last Order (銃夢Last Order , Ganmu Rasuto Ōdā ) , is the continuation of the manga series "Battle Angel Alita".
 It is created by Yukito Kishiro and tells the story of Alita (or "Gally" in the original Japanese version) continuing her quest to uncover her mysterious past.
Alita: Battle Angel is an upcoming American science fiction film based on Yukito Kishiro's "Battle Angel Alita" manga, set to be released on July 20, 2018.
 The film is produced by James Cameron and Jon Landau, and directed by Robert Rodriguez from a screenplay by Cameron and Laeta Kalogridis.
 Production and release were repeatedly delayed due to Cameron's work on "Avatar" and its sequels.
Gunnm: Martian Memory (銃夢 ～火星の記憶～ , Ganmu Kasei no Kioku ) is an action role-playing video game for the PlayStation based on the "Battle Angel Alita" manga series.
 To date it is the only "Battle Angel Alita" video game, and the only game developed by Yukito Products.
 It has only been released in Japan.