Mobile Suit Gundam Seed director Mitsuo Fukuda confirmed that the film is a sequel to the second Gundam Seed television anime, Mobile Suit Gundam Seed Destiny.
The film project is part of the Mobile Suit Gundam Seed Project ignited initiative, which was announced in 2021.
The first Mobile Suit Gundam Seed television anime aired from 2002 to 2003, followed by Mobile Suit Gundam Seed Destiny from 2004 to 2005.
The initiative also includes a new Mobile Suit Gundam Seed game and the Mobile Suit Gundam Seed Eclipse side-story manga.