Return to Oz was a peculiar movie--the plot is a free amalgamation of elements of the second and third Oz books, adapted fairly faithfully; but, as some commenter on Spatch's blog said recently, those elements were seemingly selected with a preference for the dark and weird. It also gets kind of slow in the middle, especially in the bit with the Claymation Nome King, but I do admire what they were trying to do.

I've always found it amusing that Baum explicitly said he was trying to write something less dark and violent than the kids' stories that abounded at the time--yet it's still got a lot of creepy elements.