Board Thread:Metal Gear Solid V/@comment-4913740-20140331092208/@comment-67.202.183.138-20141018002411

It might have been from this interview.

http://www.metalgearinformer.com/?p=15469

"First of all, as everyone knows Skull Face will be the bad guy in Metal Gear Solid V. However, he’s not just a plain old bad guy: his face has been stripped off, revealing his skull. This ‘skull face’ represents the human side that he lost, and the same thing happens to Big Boss, who becomes a ‘skull’ in his quest for revenge – he also loses some of his human side."