Just keep an eye on the news! ;)
I mean that literally. Eyeball placed delicately on the news page. Newspapers sop up the extra juices. Nobody wants to eat a soggy eyeball.
It wasn't a mistake that those years didn't have the skins, from a lore standpoint it made sense. :P Also going to point out that hexes/skins are two different things. :)
I won't spoil too much because would actually murder me (at least i'd be underground then), but we've got some great things for this year! I'm looking forward to the background on some of the holiday specific characters (Ecks! Skitters! etc) that we'll be adding to the Subetapedia. :)
we are planning to reimplement hexes (which is what zombie skins are before the final stage) before survival starts, don't worry :) maybe not every kind of hex, but definitely zombie strain progressions will work!
You know us though, we're going to troll you guys with a few news posts first ;)