Don't expect any announcement until after Metal Gear Solid 4 hits retail and Metal Gear Online has been given a big push.

Speaking to Japan's Nikkei BP website (reported by IGN), Konami president Fumiaki Tanaka has revealed Hideo Kojima, the famed created of the Metal Gear series, is already working on a new video game concept said to be completely separate to the Metal Gear universe.

Tanaka was unable to reveal any further info on what the new game might be, but did say a formal announcement won't be made this year; we'll have to wait until after the release of Metal Gear Solid 4 and the push to promote Metal Gear Online are out of the way.