Board Thread:Metal Gear Solid V/@comment-24677150-20140313040957/@comment-26715295-20150826174336

Tarsusydg wrote: I was thinking something later. Maybe this picture has something to do with it. Perhaps Dr. Clark performed gene testing on SF on orders from Zero, and now SF wants revenge. exactly

For anyone who's read the neogaf page or been scouring the internet for spoilers, it's been confirmed that Skull Face does go way back with rather not Big Boss, but with Zero. It's also been confirmed that Skull Face was involved with Zero during the events of MGS3, and during these events he had genetic experiments done on him, which then led him to soon loathe Zero and part ways with him, to where later on some plot stuff occurs in MGSV

And his purpose in MGS3? This gon sound stupid, but his purpose was to actually watch over Big Boss during Snake Eater and just keep tabs on him y'know. There's more that goes into it but I'll have to look for the info again considering that so many streams and whatnot are being deleted. So in my opinion, I have on doubt that this man is Skull Face.

and yeah, Skull Face isn't BB, was just some good ol symbolism.