There's no way that there are still undiscovered easter eggs in WaW. Every inch of the maps and coding has been scoured.
But then, this is the same guy who claims that the passwords for the DerRiese Server are still undiscovered, even though it's been proved that they don't exist in the game's coding. And the same guy who claimed the bald man on the Ascension poster isn't Richtofen.
I don't think he honestly intends to lie, but I also don't think he actually knows quite what he's talking about half the time. The zombies community probably knows more about this stuff than he does.