I think this thread is a good example to why it is a bad idea for companies to release vague press releases and then sit on the details until trade shows in this age of internet and discussion boards. People are making statements one more ridiculous than the other, based on google translations of a japanese text. Pentacon 6 being the so called "european lens manufacturer" P1 hinted about? Common people, seriously.
For starters Pentacon 6 was a camera discontinued in the 90's, not a lens manufacturer. Second, I hardly think Mamiya is going to compete with H3D and Hy6 with a Franken-camera with 20 year old manual lenses. What they probably were saying is that with adapters you can also use Hasselblad and Pentacon 6 mount lenses if you like.
I think the most likely thing is we're going to see Schneider AFD lenses in the Mamiya mount.