Himitsu Sentai Gorenger (Reboot)

This is the 50th installment of the Super Sentai franchise, which a reboot of the first. Many aspects of Super Sentai seasons that came after are in this season, such as a sixth ranger and mecha.

Plot
Every 50 years the Black Cross King is resurrected, and threatens the world with his Black Cross Army. The stars of Cassiopeia choose five champions to battle the Black Cross Army and protect the world, these are the Gorenger. After the Black Cross King was killed in 1975 the Gorenger founded EAGLE to find more potential Gorengers, and stop the remaining Mask Monsters from bringing Black Cross King back to life. It is 2025 and five Masked Monsters have succeeded in reviving Black Cross King, who sends them to destroy the five branches of EAGLE. Only five rookie agents and the previous Akarenger Gonpachi Edogawa survived. Recognizing there courage, Cassiopeia chose the five survivors and gave them the power to tranform into the Gorengers.