Well it looks like the rumors of an MGS Legacy Collection that a Korean site announced proved true. Apparently this collection will be released on PS3 and will include: Metal Gear Solid, Metal Gear Solid 2, Metal Gear Solid 3 (also includes the first two games, Metal Gear and Metal Gear 2: Solid Snake), Metal Gear Solid: Peace Walker, Metal Gear Solid: VR Missions and Metal Gear Solid 4. Also included are two Metal Gear Solid Digital Graphic Novel by Ashley Wood. So you can play the MGS Saga in order of release, chronology, or backwards. Though I’d suggest going in the order of release as every iteration updates their graphics as well as control scheme so by the time you get to MGS4 and PW the controls will be more westernized. The release date is roughly sometime this June so till then we can all just drool over this awesome poster below.

Source: MetalGearSolid.nl