The Totoro as the God of Death theory isnt newbut its a theory that will not die. Since it continues to attract attraction and discussion online, Japanese site Byoukan Sunday pointed out that Studio Ghibli, the studio that created Totoro, already struck down these theories a few years back.
Everyone, do not worry, read the Studio Ghibli statement. Theres absolutely no truth or configuration that Totoro is the God of Death or that Mei is dead in My Neighbor Totoro.
Continuing, Studio Ghibli addressed the issue regarding the lack of shadow surrounding both Satsuki and Mei in the films ending. This was because, according to Studio Ghibli, the films animators decided that shadows were not necessary in this scene. We really dont want people to believe this rumor, the studio added.
Art is not finished when the artist says it is. Art must be viewed and interpreted by an audience. Sometimes its correctly interpreted and sometimes its notthats for the audience to decide.