Midjourney has asked a federal US court to force Disney, Universal, and Warner Bros. to disclose how they use artificial intelligence, returning a legal volley first fired by the entertainment giants.

The studios sued Midjourney, accusing it of facilitating widespread infringement of their copyrighted characters—a potentially devastating legal challenge for the popular AI image generator. Per Variety, Midjourney has claimed “fair use” and now argues that the studios are employing the same AI features that originally landed it in court.