In 2018, David Zucker said he, Jim Abrahams, and Jerry Zucker wrote a script for a fourth film in which Frank Drebin's son was a security guard who gets mixed up with the CIA and is sent on a spy adventure. It would have been a spoof of the "Bourne" and "Mission: Impossible" films as well as the newer Bond films with Daniel Craig. The original title was "The Naked Gun 4: Nordberg Did It," then got changed to "Naked Impossible." According to Zucker, the script was enthusiastically embraced by Paramount production head Jon Gonda. However, in a later meeting, the script was not as well-received by Gonda's boss, who objected to some mild off-color jokes (including one where a woman gets a breast reduction to fit into a Kevlar bulletproof vest). Nothing happened with the project after that, and Zucker only found out about the reboot when he read about it in the press.
When Frank enters the Bengal Club, the first thing shown is the iconic "stuffed beaver" from the original film.
Liam Neeson was 72 years-old at the time of filming, five years older than Leslie Nielsen was at the time he made his final film appearance as Frank Drebin (aged 67 at the time he filmed 'Naked Gun 33 1/3: The Final Insult').
Liam Neeson himself has stated a few times in interviews when people confused his name with Leslie Nielsen's (albeit, the celebrity he is most often mistaken for is his friend Ralph Fiennes). He remembered one of the very first times was in the 1990s, when a grown person asked him something like "Is your name Leslie...Nelson?" he responded "Close, Liam Neeson". In fact, when Leslie Nielsen died in late-2010, some media and internet sites mistakenly thought it was Neeson. One internet post stated: "Sad he dies the year after his wife Natasha Richardson tragically did".
In a rare interview, comedy musician 'Weird Al' Yankovic said that he is in talks to have a cameo in this movie just like in the last three previous Naked Gun movies.