I think the idea is neat, but I see it FNF more as an alternate universe from the other things, and don't think there is really a lot of fictional lore that's official about this website. But there is technically some to timeline to the Behemoth games which are connected to Newgrounds by Tom Fulp, and their is definitely a timeline to Tom Fulp's old 1999 games with the Penilians. And Tankmen is created by Jeff who has a job to do art for this site and Jeff also made a drawing of the Tankmen and the Castle Crashers. But there still isn't really lore to the site other than the IRL stuff and the lore in some of the creations by people. But this is a neat diagram you made, except it's more like FNF lore in my opinion.