Was scrolling though David Hayters Twitter feed and came across this tweet:
Alright Hayter, Vacation's over. pic.twitter.com/xKqtzPI6TQ— David Hayter (@DavidBHayter) April 13, 2015
Picture of a reserved parking spot at a place called Formosa Group. I went to their website and looked them up. They do a wide variety of audio related stuff including Video Game VO. Their credits include MGS4, MG Rising Revengence and Metal Gear Solid V: Ground Zeroes.
^that page doesn't list Revengence but on another page there is the cover of Revengence in a collage of games they worked on.
I'm sure this is something picked apart by NeoGAF or Reddit a long time ago but I don't really frequent those sites so I figured I would just wildly speculate here.