Each actor plays multiple characters, the least being Joe Walker with two (Batman and Chilly Willy) and the most being Meredith Stepien with eight (Chase Meridian, Rachel Dawes, Citizen, Earth, Wonder Woman, The Riddler, Geek and T.G.I. Friday's Worker). However, during the end credits, each actor is only credited with two of their roles.
Many comic book fans were unhappy with the inclusion of Spider-Man in a DC universe. However, he is only ever mentioned. When he appears at the end, it is actually Alfred in disguise (a running gag throughout the musical is of Alfred returning in different disguises whenever Batman fires him). It is clear that Alfred is pretending to be Spider-Man, rather than actually being Spider-Man, because he has no apparent powers - when he gestures shooting webs from his wrists, nothing comes out, and he clearly does not have the agility of Spider-Man.
First StarKid production since Little White Lie (2009) not to feature Joey Richter in a starring role.
Each of the women seen as Batman's love interest throughout the movies are seen - Rachel Dawes from Batman Begins (2005), Vicki Vale from Batman (1989), Selina Kyle from Batman Returns (1992) (although she is only ever seen in her guise as Catwoman) and Chase Meridian from Batman Forever (1995). However, none of the characters have a role in this musical as a love interest or even interact with Batman.