Kojima already seeking out his next title
We won't know until 2009, apparently. A formal announcement isn't to be made until after Kojima finishes penning the new title's scenario. This won't happen until after Metal Gear Solid 4 is released and Metal Gear Online given a big push. So, maybe if things go particularly well for Kojima, we'll hear something near the end of the year, but we'll just safely assume we won't know if any of the aforementioned games are coming around until 2009.