Please don't assume that I'm not reading your comments.  I don't agree with you that the image needs changing at all.  Your explanation doesn't make sense to me that by using a picture from the anime, the viewer automatically assumes that it only represents the anime.  I am aware that the manga came first, but the anime adaptation of Sailor Moon is the more famous.  The lead picture is meant to assure the reader they've arrived in the right place - by using an image from the more famous anime adaptations, we can better do that. Using the first cover of the manga, when we have a better picture that shows all the main characters, is unacceptably arbitrary to me.