It’s going to be interesting what the stock companies will do. Maybe they will make their own Image Generator. Perhaps we will see a case based on the new factor that is AI. An AI is not artist; they can’t be conflated. A decent artists can churn out maybe 5-10 works if he is productive. AI can churn out by the hundreds or thousands if needed. The process also isn’t the same.
Anyway it will be interesting to watch this space.
Given the iterative contribution of a artistically-talented human prompter, I'm not sure that precedent – set by the Copyright Office in the US, rather than a clear statute or court decision – will hold up. A court might decide differently, or a statutory update could overrule the copyright office, especially in cases where an individual output is the mix of human & AI effort.
Anyway it will be interesting to watch this space.