Nothing. Past cases have settled that the copyright goes to the person who used their creative process to sort through the computer generated images and pick the quality out.

So by typing misty mountain and selecting it as good, you are most likely the copyright owner of that image.

Oh interesting. Do you have a source by any chance?

I did some more searching and it looks like its actually a little up in the air right now but that proposals are looking at making it work this way. So the AI would be considered something like photoshop where if you use the tool to create something, you are the copyright owner.

That the result may be considered a derivative work of something in the training set.

And to give my hot take: My current thinking is that the law should take a strict stance here, as the produced images will compete with, and may substitute for the original ones.

What are the original ones? There is likely no previous image that looks anything like this generation. When you draw a picture, you aren't required to credit every piece of art you have seen in the past which inspired your style.