Made some more Disney Oz stuff! (Click for better quality)
Little line up of how the characters would overall look for Disney's "The Wizard of Oz"
And then a family tree of how I'd link the characters together (usually I try to only use Baum created names but Singra is a really good name for the Wicked Witch of the South so we'll let it slide)
So my thoughts on the Glinda/Evanora/Theodora backstory is that Glinda was the daughter of King Pastoria, with Locasta the Witch of the North. But she vanished one day, and after a year of fruitless searching and another of mourning, Pastoria decided his daughter needed a mother, and married his Grand Vizir Singra, the Witch of the South.
Little did he know that Singra was actually wicked, and had been behind his first wife's disappearance.
For a while, the girls were all happy enough together. Young Theodora especially loved her new father and sister. But as they grew older, things began to change. Singra asserted more and more control of the kingdom, and Evanora followed after her footsteps, and her stepfather was convinced to name her as the official Witch of the East.
Eventually Singra made her move, and killed Pastoria--but Glinda caught her in the act, and in an attempt to save her father also ended the life of the Wicked Witch. Her defeat of Singra also gives Glinda her title of Witch of the South, on top of her royal one.
Evanora was unable to prevent Glinda from fleeing the palace and soon took up her mother's postiton as Grand Vizir/Steward of Oz, telling everyone that Glinda was responsible for the King's death. Her own powers grew in wickedness but cost her her beauty, and she was forced to rely on the magical amulet her mother used to cover her true face. She also instates her sister as the new Witch of the North.
(Singra had wished to have Evanora instated as Witch of the North, but the title could only be granted by previous holder, either willingly or through their death. Singra had been unable to truly defeat Locasta, instead locking her memories and true form away in that of an old woman named Tatty-poo, so the title could not be truly passed on, but Evanora told Theodora and the people of Oz it had been officially transfered to consolidate power)
(During her reign Evanora also had a daughter, Mombi, with the Crooked Magician Dr Nikidik)
The events of Oz the Great and Powerful happen, and Evanora and Theodora are cast out, Theodora taking up the title of Wicked Witch of the West after fleeing to Winkie Country, and Evanora the Wicked Witch of the East. They go out to battle against Glinda and Oscar from time to time, and in one battle, a firework costs Theodora one of her eyes.
Oscar and Glinda are not without their own losses though. During this time they’re blessed with a baby girl, who they name Ozma, and for several years they’re happy together, even if having to pretend Oscar is the Wonderful all powerful Wizard takes its toil. And Oscar realizes that this charade can’t last forever, for several reasons, both that he can only pretend for so long due to aging—and that both Glinda and Ozma will far outlive him due to actually being magic. In an attempt to rectify that, he seeks out a magical potion that will grant him eternal life—but the Enchantress who gives it to him is in fact Mombi, the daughter of Evanora, who tricks Oscar into giving over Ozma (his greatest treasure) to her in exchange for the potion, not realizing what he’s done.
(Ozma is trapped in a mirror that also sends part of her out into Our World, where she will later meet Dorothy in Return to Oz)
When Oscar realizes his daughter has been spirited away and that it’s his fault, his and Glinda’s relationship suffers drastically. He retreats from even her into his role of the Wizard, and she removes herself from the Emerald City to live in Quadling Country.
Meanwhile, Evanora becomes increasingly desperate to regain her lost beauty, even having Theodora's old ruby slippers stolen from the Palace in hopes of using their wishing magic--but a Kansas farmhouse costs her the opportunity.
From there the events of The Wizard of Oz plays out, (still deciding what I want to do with Theodora) but events will also happen that end with Oscar and Glinda going off together to try and find their daughter, thus explaining Glinda’s absence in Return to Oz
Return to Oz happens, and in following adventures afterwards Dorothy helps reunite Ozma with her parents, and even her grandmother Locasta
And that’s what I’ve got for Disney Oz for now!
(Also Dorothy gets to be a witch)