whats the theory you mentioned about the joker film?
Keep in mind this is just a theory that’s making the rounds based on other information that has been revealed so take it with a grain of salt. Possible spoilers for ‘Joker’ ahead…
From revealed info we already know that Joker’s mother will be obsessed with her former employer, and we also know that Thomas Wayne will be in the movie in his sixties.
The theory is that Thomas Wayne is Joker’s mother’s former employer and she is obsessed with him because the Joker is his bastard son. So the plot twist is that the Joker and Batman are half-brothers (unbeknownst to Bruce). Now when Joker’s mother dies, the Joker blames Thomas Wayne and that triggers the Joker’s decent into madness. The Joker is then the one who kills Thomas Wayne which leads to Bruce becoming Batman and Joker becoming obsessed with him.