Yeah. I mean, I guess you could just say, BBC Sherlock is the only canon, everything else is inspiration, and just not look. Personally, the first thing I did was refresh myself on the biographies of Holmes and Warson, saw that rapid engagement, and thought, ooooh job one is to work out how THAT happened from a slash perspective...

But it's probably writers who do that sort of thing, not those whise interest is casual fan fiction reading, eh?

I just wouldn't want anyone to think that I'm marrying John off because I think it's an awesome idea!!