Apart from Belial Kaiser, another Project BM! Ultraman action figure revealed is Ultraman Dyna, which will be released at the same time. As a matter of fact, Ultraman Dyna's product number is earlier than Kaiser Belial actually.
Click on images for larger view:
Project BM! No. 45 Ultraman Dyna - 300mm tall. April 2011 release, 17,640 Yen (inclusive of tax).
Project BM! No. 46 Kaiser Belial - 300mm tall. April 2011 release, 19,740 Yen (inclusive of tax).
Images are from Amiami: Belial Kaiser, Ultraman Dyna.