Re: Stuff you like to believe happened in Nolan's series
I like to think that Joker was taken into federal custody after TDK. It makes more sense than him being the only patient in Arkham. I like to think Gotham is a level of Limbo and all the characters are facets of Cobb's personality at different stages in his life.
"Never call him that!" Spittle sprayed from Theon's lips. "Ramsay Bolton, not Ramsay Snow, never Snow, never, you have to remember his name, or he will hurt you."
"He is welcome to try. Whatever name he goes by."