The Courageous Warriors of the Garden of Hope have summoned Nagisa, Honoka, and Hikari to protect their kingdom from a witch who plans to steal the Diamond Line, which is a set of jewelry the queen of the Garden of Hope wears to a ceremony every year to replenish the water of the kingdom. The witch plans to resurrect the Dark Lord and if she does so, not only will the Garden of Hope be destroyed, but other kingdoms in the galaxies, including the Garden of Rainbows and the Garden of Light. 

(Source: ANN)

Ten years ago, the villainous scientist Dr. Hell led his wicked followers, known as the Underground Empire, in a struggle to destroy all of humanity. It was against these forces that the young hero Kouji Kabuto fought, piloting the legendary super robot "Mazinger Z." Kouji's victory stopped Dr. Hell's evil plan and returned peace to the Earth. Now Kouji has left the pilot seat behind and become a scientist in his own right, following in his father's and grandfather's footsteps. Yet an unexpected encounter deep under Mt. Fuji triggers an even greater threat to mankind than ever before and alters Kouji's destiny forever. With humanity's fate in their hands, Kouji and Mazinger Z face a choice between good... and evil.

Goku and Kuririn are given an assignment by Kame-Sen'nin: "Retrieve the sleeping princess from Lucifer and I will take you as my students." But the mission proves to be more perilous than originally thought. (Source: ANN)

A hybrid anime/live-action movie for the series to be released Fall 2014. After the events of Link Joker-hen, Aichi and Kai team up to a confront an enemy that threatens the peace they've just regained. The movie also covers the events leading up to Aichi's disappearance in Legion Mate-hen.