It turns out the new game in Guilty Gear series is not Guilty Gear XXX as fans anticipated. It’s Guilty Gear 2- Overture for XBox 360. It’s not even a fighting game but a 3D action rpg probably similiar in fashion to Devil may Cry series. Two characters have been revealed to appear in this new game. They are Sol Badguy in his Holy Order outfit and a dude named Sin.
Famitsu scan here.