Gamespress (a resource for video game-related press releases) suggests that two of Konami/Kojima Production's new titles could be Metal Gear Solid: Peace Walker for PSP and Castlevania: Lords of Shadow for Xbox 360 and PS3.
The mention of a second new MGS follows assumptions we had previously (and could be the name of the already confirmed PSP title), while the addition of "Castlevania" to the already known Lords of Shadow is something that was unexpected. Although, on second thought ... it does look a bit like a Castelvania title (see the concept art after the break). Lord of Shadows has been an object of attention lately and was presumed to be the game teased in Kojima's other teaser website.
Meanwhile, one last revelation suggests Metal Gear Solid: Rising is not a 360 exclusive but will be going to PC and PS3 as well. Considering, the non-use of the word "exclusive" in Microsoft's press conference where Hideo Kojima personally unveiled Rising, it left many to speculate whether the game was exclusive to the platform. Keep in mind, however, that this listing does not confirm anything and might be a database entry mistake.