Gran Turismo, one of the greatest racing game series ever, turns 15 this year. There is an event May 15th at the Silverstone Circuit where Polyphony Digital will celebrate that anniversary and make "exciting announcements about its future." Gran Turismo 6, anyone?
There has recently been a lot of speculation about when GT6 will come out, with some pegging it for a holiday release later this year. While those were proven to be just rumors (and the box art was totally stolen), it does sound like Polyphony is ready to make some major announcements about the future of the franchise.