Everyone knows about what 'Shiggy' said, but all he said was Metal Gear... it could have been Metal Gear Solid 2: Substance... or a remake of Metal Gear Solid... Or a remake of the very first Metal Gear, for that matter...
And while all of those would be nice things to have (well except maybe substance... That wouldn't be very big), I think actual next game in the series (Meaning MGS3) would be the biggest thing of them all...
But I dunno, because didn't Kojima already say that he (or someone) was working on the next MGS game for PS2?
Which makes it sound more like if it's exclusive, it would be some kind of remake or something... But I dunno...