S.H.Figuarts Shinkocchou Seihou is a series of high end S.H.Figuarts releases that feature all new molding, high levels of detail, and the best skeletal joint system Tamashii Nations has to offer. As the idea suggests, Shinkocchou Seihou releases cost a little bit more than your standard S.H.Figuarts release.
Kamen Rider Mach Accel will release sometime in June, 2017 for a currently unknown price. The Kamen Rider Double CycloneJoker S.H.Figuarts Shinkocchou Seihou release retailed for ¥6,480 to give an idea of how much Kamen Rider Accel may retail for.
Retail price, included accessories, and more information will be revealed soon.
Source: Tamashii Nations