This was announced a while back and tentatively scheduled for release this fall. It's gonna be an ambitious blu-ray set containing Shin Kamen Rider: Prologue, Kamen Rider ZO, Kamen Rider J, Kamen Rider: The First and Kamen Rider: The Next. In short: all the standalone films that can be enjoyed without watching an associated TV series.
Mediablasters, who majorly screwed up a pair of Godzilla releases a decade ago and deservedly incurred a lot of scorn (then kinda faded away and did little for a few years), has really be revving up these lately and consistently popping out great tokusatsu releases with Gappa, Hakaider, the two Zeiram movies, and the two Zeberaman movies among the titles. I'm so happy with their stuff I take back some of the bad things I've said about them!