Board Thread:General Discussion/@comment-6747658-20130401084750/@comment-4913740-20130415135929

It could be Zadornov, as Kojima stated he would be "bringing a character back from the dead".

Although most fans have assumed that the character returning from "the dead" is Paz, since she was assumed dead after ZEKE was destroyed in Peace Walker.

However, I like the idea that it is someone that Big Boss had fought prior to the Virtuous Mission, thus further developing John's backstory prior to when we first see him.