I'm suspicious of most claims of AI growth, but I think screenwriting is an area where there's real potential. There are many screenplays out there, many movie plots are very similar to each other, and human raters could help with training. And it's worth noting that the top four highest grossing movies right now are all sequels or film adaptations. It's not a huge leap to imagine an LLM in the future that's been trained on movie writing being able to create a movie script when given the Wicked musical. https://www.imdb.com/chart/boxoffice/
The 2023 Writers Guild of America strike was in part to prevent screenplays being written entirely by generative AI.
So no I don’t think this will happen either. Authors may use use AI them selves as one tool in their tool box as they write their script, but we will not see entire production screen plays being written by generative AI set for theatrical release. The industry will simply not allow that to happen. At most you can have AI write a screen play for your own amusement, not for publication.