Another Comic Book Adaptation

Once thing that I have been debating has been the issue of images after a person death (I think 75 years after) the image of the artist becomes public domain. I also think that there are some loopholes that gives the family of the artist rights passed that. Here is an image from a well-known image by Frazetta of Edgar Rice Burroughs' John Carter and the Princess of Mars. Here the image is used in another comic book with some changes.