Towards the beginning of the film when Neeson's character is walking through Grand Central Terminal, there is a poster for Paddington 2, which shared its US release date with The Commuter on January 12th.
The sixteen personalities that Joanna refers to when she strikes up the initial conversation on the train are the Myers Briggs types.
Despite receiving the prominent second billing, Vera Farmiga has only about 6 minutes of screen time.