The film will feature another incarnation of Shocker named "Nova Shocker" and their logo is a three-headed eagle. Shocker has three commanders and the actors rumored to play them are: Tsuyoshi Abe (Hana Yori Dango), Nao Nagasawa (Ninpuu Sentai Hurricaneger), and Kouzou Takeda.
Take note, none of this info is confirmed as of this writing, the only thing that is confirmed is the new Kamen Rider #1 suit and the March 26 release date.
[Source: The Ghouly News Tumblr]