Kessho Sentai Saishuranger

Kesshō Sentai Akakiranger(決勝戦隊あかきらんげ Kesshō sentai akakirengaa) is the 50th and the last Super Sentai to be created. It celebrates 50 series from Himitsu Sentai Goranger.

Plot
After 50 years of Super Sentai fighting evil, a mysterious man known as AkaRed who made the Akaki Pirates and an ally of Gokaiger appears. AkaRed summons a team that is the Final Sentai and it has to defeat a interstellar dark-matter created villian known as Akumata who created all Villians in Super Sentai History thus the five gems known as the Akakiranger have not only protect Earth but the whole universe.

Story
After almost 50 years of painstaking efforts to ward of evil off earth the mysterious man AkaRed who appeared in Boukenger and Gokaiger and also known as "The Legend of Sentai" makes a last effort to end the evil from the universe by defeating the Evil King Akumata who created every Villian of the sentai. AkaRed actually was a unique person born from a human-like alien father and an earthly mother. He remained hidden from the Earth and in 1976 created the First Sentai "Himitsu Sentai Goranger" and remained unknown until when he first showed himself in his morphed form in Boukenger Vs Super Sentai and later in Gokaiger when he created the Akaki Pirates. Now after a lot of time AkaRed decided to create a final Sentai by gathering comman earthlings as the 50th Super Sentai to fight Akumata.