Combining Two Ideas for the Narrative Setting of the Special
From the read-through script page we know, that John is the narrator in this episode (or at least of the first scenes). And there was this great idea of John becoming a fiction writer and reading out loud his first attempts to Sherlock.
So the episode maybe starts with a war scene.
Battlefield. Behind the front we see doctors bandaging wounded people.
The suffering intensifies. The doctors try to save people but many die, while the ear-piercing noises of the war surround them.
The noises accumulate into one shot, which hits Watson. On Watson's face, eyes surprised and full of terror at the time. Night falls. Silence.
Watson leaves a train at one of London's railway stations. He struggles with a case in one hand and a cane in the other. He looks lost.
Watson on a different day. Again with case and cane. Piccadilly Circus.
JOHN: I was standing at the Criterion Bar, when
some one tapped me on the shoulder, and turning
round I recognized young Stamford.
Watson and Stamford start talking, but we cannot hear what they are saying.
Watson and Stamford walk down a hospital floor of Barts. They enter a laboratory and there is Sherlock Holmes, agitated with some test tubes. He looks up and at John...
HOLMES: You have been in Afghanistan, I perceive.
WATSON: How on earth did you know that?
The conversation between Holmes and Watson continues, but we cannot hear what they are saying.
JOHN (voice-over): Sherlock Holmes seemed delighted at the idea of sharing his rooms with me.
221B Baker Street. Living room. Present.
John sits in his chair, bounded papers in his hands. Sherlock is absorbed with the crime wall over the sofa.
Sherlock keeps starring at the crime wall.
SHERLOCK: Retelling your blog posts in a different time setting won't make them more interesting.
JOHN: It wasn't me who wrote this!
Sherlock turns around. Looking confused.
SHERLOCK: What?? - Is Anderson gone totally mad now?
SHERLOCK: Please don't tell me Mycroft's writing his memoirs!
John hands the script to Sherlock. He reads the front page. Looks up at John. They share a meaning full look. Close-up on the front page. It says...
... written by James Moriarty
Opening Titles start playing.
Because I love both the ideas of John as the narrator and of Moriarty as the narrator, I'd love to see them combined! :) Solving the Moriarty(/Mary) puzzle by reading the story Moriarty wrote about John and Sherlock. I'm sure Sherlock soon would ask John to continue reading...
[disclaimer: Everything of the above - except for John's dialogue that is included as an image - is mere speculation.]