User blog:Ebon Shadowshot/Storyline stuff

So it's been 6 days since I joined this... this, well lets say grand wiki for now, and one particular thing I've noticed about it (other than some users flaming eachover in discussion pages) is that users have created their own Zombies 'Storylines'. I want to ask, what is a storyline to the users who write them? Are they an extension of the current Zombies maps? Or are they a branched off story that makes references to the original storyline? Or are they something completely different?

I want to create a storyline that fits the description of my first question, an extension of the current Zombie maps. In reference to the achievement of the same name, it will be called Time Travel Will Tell. But the main thing I'd like to ask is whether an extension of the current storyline could be considered a Fanon storyline.