Inception, Interstellar and Tenet are very similar to each other. They're all written by Christopher Nolan and focus on the Psychology of the main character. They're extremely convoluted and focus on characters manipulating time and the human psychology. All of them seem to imply there is a higher being pulling the strings.
Inception makes in unclear whether Dominic Cobb is still trapped in a dream world from his experiments with Mal.
Interstellar has future humans controlling the dimensions to communicate with each other.
Tenet has future society trying to invert the past.
All three of these are full of plot holes and are downright twisted, insane and make no sense. But I have a theory that explains how all 3 of these movies come together.
All three movies are the Joker experimenting on people using Scarecrows Toxins.
Joker and Scarecrow are the only villains from Christopher Nolan's movies to survive. According to the Novel, the Joker might have escaped Arkham but nobody really knows. I think Joker got away and got his hands on Scarecrows chemicals and used them to experiment on people. That's why the stories are so twisted, There about manipulating the human mind which the Joker does. The Joker is tormenting people with his deranged vision, perhaps Joker and Scarecrow are working together after the events of The Dark Knight Rises. I don't know if the Prestige fits into this timeline but it's possible.
