Hideo Kojima has announced that both the Metal Gear Solid HD Collection and the Zone of the Ender HD Collection will be getting the PS Vita treatment. Kojima also revealed that the Fox Engine is in development for the PS Vita.
In Japan, the MGS HD collection will feature Metal Gear Solid 2 and Metal Gear Solid 3. Zone of the Enders HD will obviously include the first and second games in the series. Both collections are expected to launch for the Vita in 2012.
Source: Sony Press Conference