It would appear IGN are the only ones with any news on this. I'm surprised nothing more has been said about it. There again they probably won't announce it until after Facebreaker has been released.

Prizefighter looks like it'll be released on either 20/6/08 or 27/06/08. It maybe a little earlier in the US. If you go on Play.com they have a dispatch date listed as the 27th June.