I doubt Turbine will make this information available to us. One of the complaints about the old character information is that the web data included account ownership in the form of a numeric id. All this information was available to the public. There was this fan operated web database that would tell you all the character on an account. As soon as someone like me said that one character belonged to Yula, they knew all my characters.
This situation going to be one of the problem with your signature generator. Once somebody generates a signature for one of their characters. You know all their characters.
Unless stated otherwise, all content in this post is My Personal Opinion.