Secret Announcement Of A New God Of War Title?

God of War 3 only came out last Tuesday, but it seems that some people already have the platinum trophy for it. For those of you that don't know, the Playstation 3 uses trophies instead of achievements. When you get all the trophies from a single game, you get that game's platinum trophy.
Apart from the usual bragging rights to a platinum trophy, God of War 3 also gives you something a little extra, a link to a hidden page on the God of War 3 website.

 There's nothing on this page, other than some falling rain and a shield with an upside down "V" on it, but my guess is that its going to announce a new PSP title.
We've heard multiple times from Sony execs that the story of Kratos ended with God of War 3, but there's always possibility to re-visit the God of War universe from a different perspective. From the url hint, Spartans Stand Tall might be the game's title.
All of this is still pure speculation, I'm probably competely wrong about all this but regardless, its always fun to speculate :)