In the original The Wizard of Oz (1939), the Scarecrow points in many directions when Dorothy asks the way to Emerald City. In "Tin Man", Air-of-Day points in all directions when telling the travelers where to find the Seeker. Glitch, who represents the Scarecrow, responds "And you thought I had trouble with directions!"
The character "Ahamo - The Seeker" explains he is originally from Nebraska. The name "Ahamo" spelled backwards is "Omaha", the largest city in Nebraska. Also, in The Wizard of Oz (1939), the Wizard had come to Oz from Omaha.
Near the beginning of Part 2, DG affectionately calls her father, "Popsicle" (derived from the more common "pop" or "papa"). This is the same name by which Glinda the Good Witch addresses her father in the salutation of a letter home early in "Wicked," a Broadway musical popular at the time of Tin Man's production and also set in Land of Oz.
During a flashback as children, Azkadelia says to DG how smart it was to trick the trees into throwing their apples at them. This is a reference to The Wizard of Oz (1939), when Scarecrow does the same to get apples for a hungry Dorothy.
Not counting DG, only four characters are referred to on screen by the same (or similar) names to their analogous characters in the original book and The Wizard of Oz (1939): Toto, Police Officer Gulch (a reference to Miss Gulch, a character in the 1939 film), The Grey Gale, and Wyatt Cain. Cain is called "tin man" several times by other characters, most notably Glitch when he says, "Have a heart, tin man".
When Dorothy, Raw, Glitch and Cain are running across the field trying to find the hidden realm, Glitch stumbles and is pulled up by Cain, just as in the original movie when running across the poppy field the Scarecrow stumbles and is pulled up by the Tin Man.
The numbers Glitch gives Cain to deactivate Azkadellia's device include several historically significant dates: 1066 (the year of the Norman invasion of Britain), 1666 (the Great Fire of London) and 1789 (the French Revolution).
One of the hallmarks of The Wizard of Oz (1939) version of the novel was the way it transitioned from black-and-white, during the framing Kansas portions, to brilliant color in the Oz portions. This film is all in color, except when it shifts into black-and-white during the tomb sequence.