Yesterday there was an Announcement for the Blu-ray of Kamen Rider Zero-One Final Stage & Cast Talk Show which is going to start from today. This announcement featured Aruto and Izu. Izu had mentioned that there is going to be Ark Zero-One Progrise Key which will come with it.
As many of you know, Final Stage has been featuring exclusive Riders & Forms every year. So Ark Zero-One could be the exclusive Rider which might be featured at the Final Stage. The Progrise Key could be a Ark-One or Ark-Scorpion type of Progrise Key.
P.S. The above image isn't Ark Zero-One. It's Kamen Rider Zero-One Limited Red version featured on Limited Hiden Zero-One Driver. This image was just used for thumbnail.