User blog comment:FromDvToZombies/Zetsubou no Shima pre-release interview revealing a few details about Jason Blundell's thought proccess with DLC 3 and DLC 4's Zombies map./@comment-1187559-20160516165012

Eh. As I recall some time ago they stated that we hadn't found all the EEs in WaW, then said nothing more on it, and since then, nothing new has been found in WaW.I personally think they just say there's something we missed to make us think there is.