I was reading Sherlock’s post on John’s blog – which also is the very last post on that blog – when I realized something in the comments section that I probably should have noticed ages ago:
Does this ring any bell? ANYONE!?
Talking about elephants in the room, but this has been there since Series 3, hiding in plain sight. Three things stand out to me:
1. Sherlock is hinting heavily about John’s wedding as a crime scene and what happened there. He seems very lonely and desperate for some attention; he has been leaving comments for two days, but no-one cares. John and ‘Mary’ have apparently read his post, but they both merely tell him to shut up.
2. Finally, when John no longer responds at all, Sherlock allows himself to be distracted by Mrs Hudson, and they’re about to play CLUEDO. As in “clue”.