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They aren't referencing the 1951 movie, but instead the 1920s shorts series called Alice Comedies, the first of which is literally called Alice's Wonderland.

These weren't really retellings of the original stories, but it would nevertheless not be hard to imagine they would count as a derivative work under modern law and would thus have been illegal to produce without a licensing deal.

https://en.wikipedia.org/wiki/Alice_Comedies