Re: A theory about an alternate TDKR with the Joker
I do not think Joker would have been in TDKR in any major role either way. His job as a character was done. In a film that was destined to seek Bruce's catharsis, he just wouldn't have been a very good fit in a natural way. Sure, it's easy to write a small cameo, but I really do not think they would have wanted to keep him in there for the sake of it.
"No great genius has ever existed without some touch of madness." - Aristotle