ComicsMaker.ai has a suite of AI tools to automate comic creation. That includes Text to Image, Image to Image, Pose Creation and Character Training that can turn your prompts and references into high-realism comic art. The service is licensed for commercial use and has a community gallery where you can publish and earn credits.
Another good option is Neural Canvas, which has more than 100 characters and a variety of moods and illustration styles. It's designed to be easy to use and accessible, so you can create photorealistic comics even if you have no artistic ability. You can buy a 25-illustration AI comic book for $3.99, so it's a relatively cheap option.
AI Comic Factory also has a full-featured option with multiple comic styles, layout options and the ability to upload your own images. It's designed to make comic creation accessible even to people who can't draw, and it offers a variety of pricing tiers depending on your needs.