I doubt it. Other forms of AI could be useful, but generative AI? I doubt it.

And tbh even deep learning through neural networks doesn't seem to be making the leaps we'd hoped for. AoE4 promised, prior to release, a machine learning–based AI would be delivered down the line. It's now almost 3 years since release and we haven't heard a thing about it.

Maybe eventually we'll be able to easily train a machine learning algorithm to play any game at a wide variety of skill levels (or at a very high level, if not at customisable levels), but it doesn't seem like it's any time soon.