Alright
So what I was thinking was that Weasel is an important character in the zombies story.
The 4 mobsters are stuck in hell; proof of this: They have afterlife mode, there are 3 dog heads (as there was a 3 headed dog in certain beliefs of hell), and if you type 935 into the rope code, youll get 666 and hear "Not this time", and finally there is the pit of fire that you throw grenades into that gives you points.
Now, what I was thinking is that the mobsters are stuck in a loop (aka the "cycle"). So in order for this story to actually cause impact this cycle must be broken. What happens after this we do not know, but what we do know is that Weasel lives and he lives for a purpose. Seeing that so far, ALL the zombie maps created have elaborated on the zombie storyline, this map is important and is not a seperate story on its own. We also know that this was before Richtofen(blue eyed zombies) and Samantha(yellow eyed zombies)and that, time wise, this was the first event in the zombies storyline-this was taking place in the 1930's.- (the Chinatown map being the last known event).This may very well be far fetched, but who knows, Weasel could even be the electric boss found on Tranzit (the blue electricity that he shoots at you resembles afterlife mode) and technically, he would not have a physical body, but a "new" one because he was dead in the first place. But we wont know any more than this until a new zombie map comes out, or more easter eggs are found.
~Hope I could help reply if you can elaborate~