- What Could Have Been:
- Tragically in-universe as there's an arc in Volume I of Art trying to procure his mother's diaries from his father only to find Vladek destroyed them. Just imagine how Maus would have been with Anja's diaries.
- In addition, Art asks his father about the letters of his French friend (a frog) from the camps when they corresponded after the war. Vladek regretfully says he destroyed those too.
- Art mentioned he turned down offers to have the comic turned into an animated movie - it's even alluded to in the second volume.
- It was originally going to be one volume, but Spiegelman wanted to get it out ahead of the release of An American Tail, a movie also featuring Jewish mice. Spiegelman has publicly accused the directors Steven Spielberg and Don Bluth of plagiarism, though beyond using cats and mice as a metaphor for racism the similarities between the two works end there.