Like the title says. The CYOA book publisher is suing Netflix over the interactive piece of fiction, Bandersnatch. There's two claims, one is about unfair competition (since apparently Netflix had previously been in talks with the publisher about making a branded CYOA product) and the other is about "false designation of origin." Netflix hasn't used the words "Choose Your Own Adventure" anywhere in its marketing, but the publisher seems to be claiming that, because of the interactivity, the product is so similar in concept to its books that it's caused serious brand confusion and “causing confusion, tarnishing, denigrating, and diluting the distinct quality" of its books.
I can't speak to the validity of the first claim, but the second claim seems like the kind of thing that, if successful, would threaten basically all interactive fiction; aka pretty much every video game. Hopefully the case just gets tossed.
ETA: Just noticed the somewhat hilarious typo in the title; fixed now.