Bandai Tamashii has updated the Shinkocchou Seihou page on their official website with the release details for S.H.Figuarts Shinkocchou Seihou Kamen Rider Shin Nigo. For those who are unaware this version of Kamen Rider Nigo debuted in the later half of the original Kamen Rider series. The figure will include exchangeable wrists, an alternate muffler piece, and a replacement antennae. S.H.Figuarts Shinkocchou Seihou Kamen Rider Shin Nigo will be a retail release in May 2018 priced at 6,480 Yen.
Source: Bandai Tamashii