Sony's London Studio is currently at work an a brand new, as of yet unannounced PS3 exclusive. Martin vad der Meulen, and employee if Sony Computer Entertainment Europe, listed the game on his LinkedIn Profile.
His profile clearly states: "Creative Producer - unannounced PS3 title at Sony Computer Entertainment Europe. I currently work on an unannounced PS3 title within Sony's London Studio."
The London dev was at work on some exciting AAA titles like Eight Days a few years back. Those projects were put on hold however when the team started to work on Eyepet. Chances are that this is something related to their kid-friendly franchise instead of one of the more hardcore projects that we're hoping for.