This sets a hilarious precedent where downloading torrents becomes completely fine. You can just cite this case if they win - even though we are talking about books the MPAA is probably going to have an opinion here.
Expect Meta to "win" as in the plaintiffs just give up and calculate it's not worth pursuing. It would stun me if they even settle.
Not to mention the LLMs themselves are creating unauthorized copies of copywriten content. But again, Meta has unlimited money. Different rules for them.