In Monsters and Mayhem, theres a little easter egg in I believe one of the universal classic monster rooms or Castle Vampyr where it you look around theres a little makeup bottle which is from the company that trademarked the character of Bloody Mary. I believe theres some pictures of it aswell so its not hard to find pics of it.
That being said.. your right that Mary Agana had a huge part in it.But I wouldn't save your breath of the character of Bloody Mary returning but more of Mary Agana.