Principal photography took place from October to December 2022 in Los Angeles.
At 1h 8m while Knox is being interviewed by Detective Emily at the police station he says "As far as you're concerned I'm Schrodinger's murderer". He is referring to the experiment / theory that physicist Erwin Schrodinger created in the 1930's dealing with quantum mechanics. Primarily quantum superposition. The experiment in itself is a paradox.
Titled "Assassin's Plan" in Australia, for some reason.
Fourth film where Al Pacino appeared with a Batman actor, this time with Michael Keaton. Pacino previously starred with Val Kilmer in Heat (1995), with Ben Affleck in Liebe mit Risiko - Gigli (2003) and with George Clooney in Ocean's 13 (2007). Moreover, Pacino mentioned "Batman and Robin" while talking to Leonardo DiCaprio in the first minutes of Once Upon a Time In... Hollywood (2019).