The games will still be designed by humans. Generative AI will only be used as a tool in the workflow for creating certain assets faster, or for creating certain kinds of interactivity on the fly. It's not good enough to wholesale create large sets of matching assets, and despite what folks may think, it won't be for a long time, if ever. Not to mention, people just don't want that. People want art to have intentional meaning, not computer generated slop.