“The ending of ‘Joker 2’ is explained: The joke is on us”

Note: Full spoilers for Joker: Folie à Deux are below. The highly anticipated and long-awaited sequel to 2019’s $1 billion-grossing “Joker” is finally here: “Joker: Folie à Deux” is now in theaters. Joaquin Phoenix reprises his Oscar-winning role, this time…