Further speculation, brought on by a 7-eleven product listing.
http://www.joystiq.com/2009/05/21/upcoming-famitsu-to-cover-new-metal-gear-game-for-playstation-sy/
Come to think of it: A Portable Ops sequel would be cool too, or even a more flushed out Big Boss game for the PS3 that leads up to the events just prior to Metal Gear. Better yet, an explanation of where Big Boss has been since the Metal Gear games.
I read about the Japan 7-11 stores listing the next PSP+PS3 magazine having a new MGS game a few days ago. Interesting stuff. Notice, it could be for PSP as well the PS3.
Oh, I'd be careful of the "pointing out items of interest" in those magazine scans. I've seen a lot of them, so far. Here's a few I like...
Want to know where the "tornado" rumor came from? Click the link below...
http://www.gamefly.com/game/ps3/Tornado-Outbreak/137550/
If it is a game about weather, then this is what we can maybe expect as far as Japanese Gods that control weather...
Kumori (ku-mo-ri) = Cloudy
Kaminari = Thunder and Lightning = God is Raijin and his companion Raiju
Hare (ha-re) = Sunny or Fine - Goddess of sun is Amaterasu
Yuki (yu-ki) = Snow or Snowy
Ame (a-me) = Rainy or rain
Kirisame or Mekaame = Drizzle
Hitoame = shower/rainfall
Ooame/taiu = heavy rainfall/downpour (like doshaburi or gouu?)
Kosame = light rain/drizzle
Fuuu = wind and rain/rainstorm
Boufuuuu = (violent) rainstorm
Harusame, shunu = spring rain/bean-jelly sticks ??
Shigure = an on-off again late autumn/early winter rain (shi = toki; is "gure" archaic or an alternate reading for rain?)
Saiu = Fine/misty rain, drizzle (sai = minute)
Raiu = Thunderstorm (rai = thunder)
Amamoyou/Amemoyou = signs of rain
RAIJIN (Raiden) = Japanese God of Thunder and Lightning
RAIJU = Raiden's Companion
AMATERASU = Goddess of Sun
FUTEN = Japanese God of wind