It's SurferGirl, so I'm not believing any of this.
However, some of them could be true. I've had a feeling that Quantic dream is becoming like Insomniac, Ninja Theory, etc. They are being heavily supported by Sony, and I think that they are on their way to become full 2nd party by the looks of it.
As for the Konami/Castelvania rumor, Konami does seem to be the one Japanese developer that still has some love left for Sony, so it could happen.