I think it's Z.O.E 3 or Snatcher which would make sense for them to debut at TGS. Also what Kojima said about the exclusivity of MGS. It's true. MGS has appeared on tons of consoles (Handheld's included) both as Multiplatform and Exclusive. Yet they only find major success on Playstation consoles. MGS1, MGS2, MGS3, MGS4, MGS: Portable Ops, MGS: Peace Walker(Is so close to) have all sold over a million copies worldwide. But you look at the MGS that appeared on Nintendo and MS consoles and the success is not there.
I honestly think that Rising 360 won't outsell the PS3 version. I'd be willing to bet it's going to end up like FFXIII where the difference is 4:1 PS3