Kamen Rider Black Sun (2022)

Dogai Ryuga, the Golden Knight Garo, has regained his golden glow and destroyed the evil plots of Horror. An encounter with a mysterious knight clad in “steel” leads Ryuga to the next test. Now, the story that approaches the origin of the protector begins!

After being kidnapped by the cult Gorgom on the night of their 19th birthday, stepbrothers Kotaro Minami and Nobuhiko Akizuki were submitted to a cyborg surgery with the purpose of becoming the candidates for the next Gorgom Creation King. Both of them are called Century Kings and are destined to best each other in a final battle - whoever wins will become the next Creation King. Kotaro escaped before getting brainwashed (which is the final step in the surgery), with help from his foster father, and turned against Gorgom. He soon finds out the horrific truth from his stepfather: Gorgom originally killed his true parents and, since both Kotaro and Nobuhiko were born on the day of a solar eclipse, referred as "Black Sun" and "Shadow Moon". Kotaro, taking on the name of Kamen Rider Black, was determined to rescue his stepbrother from Gorgom while protecting Japan.

Half a year after the downfall of Gorgom, Kotaro Minami has gotten a job of a helicopter pilot in a business owned by the Sahara family. Kotaro is later captured by the Crisis Empire and offered a place in their group. When Kotaro refused, his King Stone was shattered and he was thrown into space where the sun's radiation mutated his King Stone and he mutated into Kamen Rider Black RX. With his new powers, he battles the Crisis Empire and thwarts their plans to take over Earth.