the film you mentioned, an Elton John song.

Idk. Maybe you are right. It's not as famous as Batman, I guess.

I am always amazed how many idioms in English come from the wizard of Oz. I feel like people are always saying, "we're not in KS anymore" or "ding dong the witch is dead" or "lions and tigers and bears oh my!" or "follow the yellow brick road" or "there's no place like home" or "I'll get you my pretty" or "pay no attention to the man behind the curtain."