Hideo Kojima has tweeted some interesting information about the Metal Gear Solid HD Collection set to be released for Xbox 360 and Playstation 3.
The Japanese package will contain Metal Gear Solid 2, Metal Gear Solid 3 and an access code for Metal Gear Solid 1, which presumably can be validated through -for example- the Playstation Network. The HD versions are based on both the Substance and Subsistence versions, which means the HD collection will include the original MSX games Metal Gear and Metal Gear 2 Solid Snake!
The Western package will get a bonus with the Playstation Portable game Peace Walker, but won't include the Metal Gear Solid 1 access code. Anyhow, this release will also feature the original two MSX Metal Gear games.
Relevant link: Hideo Kojima twitter