Technically, it can get good by the time. But legally, it will face a huge obstacle to prevent it to get good. Why? Because these so-called generative AI are basically models which were trained on human input, which in this case are movies and series made by anime studios like Ghibli, for example. And without permission granted by those studios, there will be nothing for those models to train on. Not to mention the cycle of inbred, where the AI output will then be the input for a new cycle.