Putting aside the ridiculousness of Mickey's effects on Copyright law...

These images aren't potentially infringing because of a certain style of shading, a certain line thickness, colour balance, or anything else like that. They're potentially infringing because they're MICKEY, and even then, they're no more infringing than any Mickey fanart would be.

If you draw your own character in the style of Disney, you haven't infringed on Disney by mimicking their head style. Style is not copyrightable.

These images are in fact the perfect example to show that these people don't have a copyright argument against AI.