Remember in “The God Complex ” when the Doctor looked in the room that held his greatest fear?
He looked in the room and said
If I was a famous author I would publish a book with ten different endings which all went to print with varying degrees of rarity, but not tell the fans about it so that I could watch their confusion as they disagree over how the story ended. Then when they figured it out I would ‘come clean’, telling them that I had released eleven alternate endings and watch them panic again as they all try to find the last ending.
This is perfect.