Loved the movie and would enjoy seeing sequels, but I needt o clear up a few things for some of the other reviewers-
1- The 1939 film was not the original. The original Oz film was made in 1910. The 39 version was itself a remake.
2- This is not a direct prequel to the Judy Garland film. This is the reboot prequel, like Batman Begins. Disney is creating their own version of things. The 39 film was about a girl having a dream that she wakes up from. This is closer to the books. This is about Oz being a real world set in an alternate reality rather than being a dream.