"Dorothy and the Witches of Oz" can typically be found on various streaming platforms, but availability may vary by region. You can check services like Amazon Prime Video, Google Play Movies, or iTunes for rental or purchase options. Additionally, it may be available on DVD or Blu-ray from retailers. It's best to search on your preferred streaming service to see if it's currently offered.

"Dorothy and the Witches of Oz" is a 2011 fantasy film that serves as a sequel to L. Frank Baum's original "The Wonderful Wizard of Oz." The story follows Dorothy Gale, now an adult, who returns to the magical land of Oz to confront the Wicked Witch of the West's lingering influence. As she navigates this enchanted world, she encounters various characters, including witches, and discovers her own powers. The film blends adventure, fantasy, and themes of self-discovery, while exploring the legacy of the witches in Oz.

As of my last update in October 2023, there is no official information confirming that Ariana Grande will be in any new "Wizard of Oz" movie, including "Dorothy and the Witches of Oz." The film, which was released in 2011, features a different cast and storyline. If you're referring to any upcoming adaptations or projects related to "The Wizard of Oz," keep an eye on entertainment news for the latest casting announcements.

In the original 1939 film "The Wizard of Oz," there are four main witches: the Wicked Witch of the West, the Good Witch of the North (Glinda), the Wicked Witch of the East (who is killed at the beginning), and a brief mention of the Good Witch of the South. However, only Glinda and the Wicked Witch of the West have significant roles in the story. The Wicked Witch of the East is not seen, as she is already defeated when Dorothy arrives in Oz.