Sony starts a mystery countdown on the official page

It became clear that Sony began a mystery countdown on the official page.

When a page is accessed, a mysterious Flash movie is played, the character "S" and the countdown are displayed, and the sound of thunderstorms, talking sounds, screams, etc. start to flow.

Details are as below.
http://www.jp.playstation.com/scej/title/nt/

According to this page, as of 11:00 on April 16, 2008, the remaining time is 52 hours, and something seems to be announced at 15:00 on 18th.

Also, as this page is within the official website of the Playstation, it is probably thought that what is announced is the game title, but what will be announced? I am also concerned about the letter "Sa" written only in one character in the red screen as a whole.