It is a spin-off of the Saint Seiya anime series written and illustrated by Masami Kurumada, produced in commemoration of the 25th anniversary of the franchise.

Omega was created as an alternative to the series' direct sequel Saint Seiya: Next Dimension due to lack of material to adapt.

The storyline of Omega takes place 25 years after the Holy Wars of the 20th century narrated in the original manga and its anime adaptation.

As an installment separate from Kurumada's work, the series will introduce characters new to the Saint Seiya fictional universe, that will make use of elements already established within it.

Additionally, known elements from Saint Seiya, such as the Cloths, the armors worn by the Saints, bear their known constellations, but are presented in Omega with a new design that differs substantially from those in the original source material, and departing from it, the Cloths emerge from jewels worn by the characters to envelop their bodies, which are known in Omega as ClothStones (クロストーン, Kurosutōn).

The Cosmo essence, one of the basic concepts of Saint Seiya, is expanded in Omega with the addition of specific elemental properties: Fire (火, Hi), Wind (風, Kaze), Thunder (雷, Kaminari), Earth (土, Tsuchi), Water (水, Mizu), Darkness (闇, Yami) and Light (光, Hikari).

[10] In February 2012, it was announced that the Omega animated series would be adapted to manga form, and it started serialization on March 26, 2013, in Kadokawa Shoten's Kerokero Ace magazine.

[12] Bandai released a fighting game titled Saint Seiya Omega - Ultimate Cosmo on November 29, 2012, for the PlayStation Portable.

Bamboo Dong from Anime News Network said "Saint Seiya Omega is your archetypal hero tale, in which someone finds his true calling for justice, and together, he and his friends band together, embrace friendship, and vanquish evil from the world.

The updated character designs and the new elements not seen in the classic series made Holden note that Omega managed to attract a new generation of fans.