Heck, I bet this IS on the same engine as Blazblue anyway.
The newly opened Persona PR blog also revealed today that the game will make use of Taito's NESiCAxLive and Taito Type X2 hardware and distribution system for its arcade version. This isn't too surprising considering that the BlazBlue games use a similar setup.
I'm not saying that I will not be buying the game if there is no Japanese audio but is a little weird playing a fighting game without Japanese screams and all that nonsense after so many years of playing fighting games like that. That's all.