Update:
A new article from Famitsu (
http://www.famitsu.com/news/201404/24052150.html) shows more info:
Manufacturer: Arc System Works
Compatible models: PlayStation 3
Release Date: Will be released July 24, 2014
Price: 5800 yen [tax] (6264 yen including tax)
Genre Action / Fighting
Remarks 5370 yen [tax] (5800 yen including tax), producer download version: Toshimichi Mori, Narita TenWataru, Character Design: Seiichi Yoshihara, music: Come rabbit (Transistar)
Nanase is confirmed as a playable character, and there will be another playable character (there are no more details about it).
And a scan made by Kurishi from Dustloop:
https://i.minus.com/iwn46BAH5O6Im.png