Well, I am just basing it off the fact that a bunch of people are already using AI in this fashion. Without something to fill this gap I think AI would be a likely candidate.

https://thereader.mitpress.mit.edu/silicon-valleys-obsession-with-ai-looks-a-lot-like-religion/

https://en.wikipedia.org/wiki/Way_of_the_Future

It has already become common for existing religions to use AI to answer spiritual questions and preachers have started using it to write sermons.

I think cutting people off of traditional religion would accelerated this AI god concept. This is just my opinion of course.