Kamen Rider Shin (also the name of the film in which he's featured) was released in 1992 and was a fairly major departure from the roots of the all the Kamen Rider series and films that preceded it.
Influenced by other successful films and franchises of the time, Kamen Rider Shin was dark and violent, catering more to the audience who had grown up on the show and were now adults. However, the departure from what made the Rider franchise so popular in the first place went over like a lead balloon and the film flopped.
Even though his design makes him stand out from the rest of the Kamen Riders in the show's history, I still think there's a bit of 90's nostalgia to be found in the character now that enough time has passed.
Since his original film, he has appeared in several subsequent films where the Riders over the years all gather at the end to defeat a powerful, common foe.
He'll be released in May for a Yen price of Y4,320