In this movie, the nut shop is called "Nibbler's Nuts". In The Nut Job (2014) the shop was called "Maury's Nuts". It's possible that the last name of Lana, King's girlfriend, is Nibbler.
The poster of the gang in the acorn is an homage to the poster of Monty Python and the Holy Grail (1975).
Mr. Feng, voiced by Jackie Chan, is shown to have a one-inch punch attack. Coincidentally, the one-inch punch is commonly attributed to Bruce Lee, for whom Chan had been a stuntman on two of his movies (Fist of Fury (1972) and Enter the Dragon (1973) specifically).
Brendan Fraser and Liam Neeson are going to reprise their roles as Grayson and Raccoon. Grayson will join Andie on her quest to find a new park and Raccoon will seek revenge on Surly for defeating him, but only to get reformed during the film's climax. But Grayson and Raccoon are absent when the film is released.