If you blinked during the multiplayer reveal then you might have missed it. Players will be able to customize their character to look like the famous and original Ghost from Modern Warfare 2.
The “head” portion of character customization is basically the face of the character, which means you’ll be able to equip Simon “Ghosts” with any helmet in the headgear section. There’s even a similar uniform in the game:
UPDATE: Spotted Simon “Ghost” Riley in-game footage from reveal