it could have something to do with the words that appear. like spelling LUNA and getting Death Machines i have heard if you spell HYENA you get a PPSH from CoD WaW. Im just taking a stab in the dark that if you spell out something the lunar landing may take you out to the fourth landing(FREEDOM) also i have heard the theory of the campaign mission where you escape the prison camp the list of steps Reznov says may layout the Secret and the last step is freedom. 2 steps B4 that is wield the iron fist like campaign in zombies youu get a DM and after that is rain hell and thats what happens when u have a DM but idk im just putting ideas out about the mystery man easter egg for those who dont believe its the end. Also one of the steps is SKEWER the WINGED BEAST (DESTROY ROCKET w/ UPgrded RG) *NOT SURE, JUST HELPING*