BUR #51651 has been approved by @evazion.
create implication return_to_oz -> the_wizard_of_oz
The main Wizard of Oz tag covers most adaptations, if we're going by book logic its (fairly faithfully) adapting 2 of the sequel books to Wizard of Oz, and by film logic its intended to be seen as a sequel to the '38 film, even licensing the rights to the Ruby Slippers.