A short summary: ComicMix ran a Kickstarter in September 2016 for the book, intended as a Star Trek adventure told in rhyme, written by David Gerrold and drawn by Ty Templeton in the style of a Dr. Seuss book. Dr. Seuss Enterprises sued.
In December 2017, trademark infringement claims were dismissed, but copyright claims were allowed to proceed. In March 2019, a judge affirmed that the proposed book was transformative and could be published on fair use grounds.
The Seuss folks appealed. The 9th U.S. Circuit Court of Appeals took their side, ruling that the project was not parody or sufficiently transformative. As Heidi noted in her summary at the end of 2020, “most big companies let this kind of thing go, but the Seuss estate is notoriously litigious.”
The Supreme Court had refused to take the case last June, which didn’t leave a lot of options. The case has now been settled. The ruling sets a precedent that mash-ups may not have legal protection, as the court found that simply putting two properties together wasn’t transformative enough.
comparisons via Owens, Wickersham & Erickson