The Wizard of Oz!!!
Let me explain that, as I can already hear you sighing, "Dude, there is a movie for that. It's kinda famous!!!"
I wish that they would go back and make a series of movies, each one a separate book from the Wizard of Oz series, using the same actors for continuity. Think Harry Potter! It would just be so cool to see some of the other Oz stories, like Ozma of Oz or The Patchwork Girl of Oz, up on the big screen utilizing today's technology to bring the characters to life. They wouldn't have to do every book in the series, naturally - there must be hundreds by now and even the L. Frank Baum ones get repetitious after a while - but if some film producer would choose a half dozen or so Oz stories and make some movies, I think the end result could be awesome.
Obviously, someone's on the same page as me, because there are at least three Oz-related movies coming out in the next year: The Witches of Oz, Dorothy of Oz, and Oz: The Great and Powerful. Maybe, if these new stories do well at the box office, someone will decide to go back and look to the older books for inspiration.