[4] Macross Delta is set in the year 2067, eight years after the events of Macross Frontier in a remote part of the Milky Way Galaxy called the Brísingr Globular Cluster (ブリージンガル球状星団, Burījingaru Kyūjō Seidan), which is plagued by the Vár Syndrome (ヴァールシンドローム, Vāru Shindorōmu), a mysterious phenomenon which turns people berserk without any apparent cause.

A team of talented idols, the Walküre, uses the power of their songs to calm down the infected by the Vár Syndrome, assisted by the Delta Flight, a team of experienced Valkyrie pilots, while facing the interference from the Aerial Knights of the Windermere Kingdom, which found a way to exploit the infection in their favor as part of their plan to resume war against the New United Government (新統合政府, Shin Tōgō-seifu) for control of the Cluster.

[6] A promotional visual created by artist Hidetaka Tenjin an depicting 2 fictional dogfighting aircraft was posted in the franchise's official website on Friday the 25th September 2015.

He also noted that he has been deliberately avoiding more direct design inspirations from current real world fighters, since stealth technology has made modern combat aircraft look too similar and harder to distinguish from each other.

[6] The staff also presented the official designs by Shōji Kawamori for the two main variable fighters: the VF-31 Siegfried and the Sv-262 Draken III.

While describing the Sv-262, Kawamori mentioned that this is the first time that a Valkyrie with this unique delta wing design variant has appeared in Macross.

Kawamori started to describe more details about Macross Delta's setting but stopped short and asked fans to watch "The Super Dimension" Production Unveiling event.

[4] Other characters include five girls that form the "Tactical Sound Unit Walküre", the first major songstress group in the Macross anime franchise.

[4] A Macross Delta Preview Special was aired on Japanese television on New Year's Eve in 2015, with the all-but complete first episode.

A compilation film with some plot changes, Macross Delta the Movie: Passionate Walküre, was released in Japanese theatres on February 9, 2018.

The third, Macross Delta: The Diva Who Guides the Galaxy (マクロスΔ 銀河を導く歌姫, Makurosu Deruta Ginga o Michibiku Utahime), was serialized in Ichijinsha's Monthly Comic Rex.

The last, Macross Delta: The Black-Winged White Knight (マクロスΔ 黒き翼の白騎士, Makurosu Deruta Kuroki Tsubasa no Shiro Kishi), was also serialized in Monthly Comic Rex.

[9] However, on March 1, 2021, Big West, Studio Nue and Harmony Gold reached an agreement on the international distribution of most Macross sequels and films.