The graphics of MGS2 were so eye-popping, that I don't see how they could improve it. Though I wouldn't mind!
It's such a shame that Kojima-san won't be working on the next project. I heard he's working on some kind of father-son relationship type game.
Hmm....anyway, I do hope there will be more night missions and the graphics will be improved even more. But, I don't blame them if they can't do it. And, the next MGS HAS to be on the PS2, otherwise.....