Return to OZ
I watched this recently and Jesus Christ fuck it is so creepy.
This film came out in 1985 and its the spiritual successor to the children's classic movie "The Wizard of Oz."

Before I begin, let me tell you about some behind the scenes of Oz for a sec because I think its interesting.

The first book "The Wonderful Wizard of Oz' came out in 1900, we all kind of know that story, but L. Frank Baum wrote another 14 books. Then theres another 26 canon books by various authors. and a whole bunch of other books and companion stories, which may be canon or not depending on who you ask.

Russian novelist, Alexander Volkov, translated and adapted The Wonderful Wizard of Oz to Russian, but then went full headcanon and wrote several books of his own invention.
Then theres Wicked, written by Gregory Maguire in 95. Its a TWWoO prequel and it got turned into a musical. Gregory then went on to write several more headcanon books.
You can read all about that stuff here.
ANYWAY. The film 'Return to Oz' is an amalgamation of official canon books 2 & 3 - The Marvelous Land of Oz, and Ozma of Oz.

Spoilers below
Let me tell you something - this is not a movie for children.
That didn't stop my parents from putting it in front of me to watch his as a child, but heyoooo
To start, everyone thinks Dorothy is nuts, so her guardians send her to get Electric Shock Treatment? It was the style of the time. Horrific. Lets just skip to when she gets to Oz.

Dorothy has Returned to OZ.
She's got her sassy chicken Billina with her, not Toto. Could Toto talk in the Wizard of Oz? I don't think so, but Billinda can.

They follow a broken yellow brick road to the Emerald City, and every one has turned to stone. It is distressing.

WHEELERS
Then she is attacked by wheelers. These fucking wheelers man, they will be in my nightmares. Their wheels squeak menacingly and they shriek like a harpy. I hate them I hate them I hate them.
I hate them so much.

They run, find Tik-Tok, the og, the Tinman 2.0. Gotta wind up his mobility & thinking power, and he runs out of juice often. Hijinks.

You know what, tik-tok is such an MVP taking out them wheelers. Maybe that's why I liked Blitzcrank an other robots like the Iron Giant, I digress.
They head to the throne of OZ where Scarecrow "should" be the king, but that is not who they find!
They find Princess Mombi, who is actually an amalgamation of the Wicked Witch of the North & Princess Langwidere. That isn't important it's just a fun fact for you.
Anyway, she has a room full of heads which she can hot-swap, its pretty horrific. Fantastic dress though.

Mombi locks Dorothy up, and meets Jack who also imprisoned. A pumpkin with stick arms bought to life via Mombis plot device, The Powder of Life.
He has a fun dress sense and an inspiration for Jack Skellington, as imdb trivia tells me.

They're giving goth x sunshine coded.
Anyway, Dorothy manages to steal The Powder of Life, accidently waking Mombi up.
My god the heads. They shriek and scream.
I remind you I was a child watching this.

imagine the shrieking, screaming and dramatic music as you watch that.
Dorothy and the gang whack a deer Gump head onto to a sofa with some rope and attach palm leaves as wings onto it, then sprinkle the The Powder of life onto the creature.
The abomination lives and they fly away to safety.
They do not treat the Gump very well.

I think thats all the important stuff covered.
Theres also a Nome king who is the main antagonist, hes a dick. Rescuing scarecrow yadda yadda.
Its been out a while and I think Dennis Villeneuve should do a remake.