Yeah, this is actually happening. And Walking Dead TV show actor Norman Reedus is the star. It was revealed in the form of an interactive teaser on the PlayStation store.
You can see the reveal at 1:16 (one hour, sixteen minutes) of this video.
The video shows a man who turns out to be actor Norman Reedus on a darkened street before revealing the the names of Kojima and del Toro. He looks at the camera, and then the Silent Hill logo appears.