I've started work on a post-Capella era fanfic. However, I have some major back story ideas that would require me to shove forward the ENTIRE FS timeline. Basically, to make the back story plausible, which is necessary to make the main plot plausible (and I feel doing so adds a lot to my story) , I need there to be a few hundred years more history.
So I'm thinking of shoving the entire FS timeline forward to the 2700's. In case that isn't clear, I would preserve the relationship between all the games and my story. My story would still occur about 15-20 years post-Capella, but I would have shoved the entire timeline forward about 500 years and fill in the newly created space with my own back story.
Maybe this is too presumptive of me? I want people to actually read and enjoy the story. So if doing this is asking too much in terms of the suspension of disbelief I'll re-work my back story. But if most people are cool with the idea I'll just do that, cause it's the easiest way to make it work.