Hi,
A caveat: I'm not in charge any more. I just write what I'm told to now. So, everything I said before can now be totally wrong. Even then, the in-universe perspective is that they'll likely never be solved. I only discussed the elements that (as far as I know) really have no forthcoming in-universe solutions in the works. Heck, the last plans I had for Word of Blake had those two Hidden NEVER to be found, even centuries after the Jihad. And IMO, Stone's identity mystery has dragged on so long now that any revelation of "the truth" would be a "so what?" moment, because everyone else of remote importance to the plot has already been accounted for and/or has passed.
On the other hand, the Wolverweenies and their connection may yet be a relevant plot point to someone, at some time. Ergo, I won't reveal that answer, even if it does change.
So, really, all I did was put down the lame horses, and sent them to the glue factory. Because beating them is dullsville.
Thanks,
- Herb