Wicked (theatre)/WMG

Schwartz wrote this play for no reason but to make something that plays havoc with our expectations.
Every time Wicked is mentioned in something, it's always, "You'd think that X song would apply here, but it doesn't because of this"; and then everything falls into interesting debates about the philosophy of good and evil. About the only song that's avoided this is "The Wizard and I," but Schwartz has stated in The Grimmerie that it's there because there's always a song like that as the second or third song.

Pure water will melt her.
Elphaba in the musical, naturally. However, there is no pure water in Oz. All the water has fluoride in it. Even the rain. Why? Oz is magical.
 * Rain isn't necessarily pure water - if Oz is sufficiently smoggy, she would be immune to rain, as well, since it now is acid rain. Elphaba can't die.

Elphaba is a Spark.
Moreso in the book than the musical. However, she manages to take a book of strange origin and understand its secret quickly and makes the Flying Monkeys... aka constructs. I seem to recall she was reading about how to add parts of one animal to another painlessly (Monkeys with Roc Wings in her case) at one point in Part IV or V. Perhaps she got it from her father O.Z. Diggs.

Elphaba created the first draft of the Crucible of Ahriman.
The spell cast by her on Fiyero (let his bones never break, let his flesh not be turned, though they beat him let him feel no pain) Compared to the Crucible of Ahriman, which turned his fellow Thousand Suns into walking suits of armour, without flesh, blood or bones.

In the musical, The Wizard never completed his journey back to Nebraska.
Not only has he been deposed and forced to return to a life of poverty and mediocrity, but he also believes that he's resposible for the death of his only child. So, he waits until the balloon's well and truly outside Oz's borders, and jumps. Unfortunately for him- and all of Oz-, he ends up surviving thanks to the intervention of the Nome King, who offers him a quick death in exchange for information on the political situation in Oz; once the Wizard has finished babbling out everything he knows, the King adds him to his ornament collection and begins planning for the invasion...

Zac Efron will play Fiyero in the movie, the fanfiction section will be swarmed by tween Efron fans and any author who is even halfway decent will be driven to jumping off a cliff.
Or alternatly - you know just give it up
 * Similar. They're actually trying to get a Idina lookalike from Glee to play Elphaba.
 * That Idina look-alike is Idina.
 * She/he meant Lea Michelle.