User blog comment:Crazy sam10/Call of Duty: Ghosts Teaser Trailer released/@comment-2108119-20130506170801/@comment-1263839-20130506171049

I don't remember him doing anything notable.

I could list what he does in game, somebody else will have to tell me what he did in the comics.

In game:
 * He assisted torturing Rojas' Assistant.
 * He hacked the computers of the gulag.
 * He helped during a few battles.

It's a nice theory, but it's flaw is that Ghost himself is quite boring and his work just seems to be something any other person could do (except maybe the computer hacking).