I think this depends on what the guy meant. We have "AI" that can create images, videos (so related images), write stories, write code etc. I could see an AI used as a tool to build AVNs quickly where a human is telling the AI the ideas for the story and choices and the AI programs and creates the images you want. Might be some selection needs, some way to make revisions etc. But I know of a number of people who have used AI to write songs, scripts, and generate images of fantasy worlds they made up so it's not out of the realm of possibility.