Just got word today that Sherlock Holmes: Consulting Detective vol 3, which is 1/4 by me, has been greenlighted by the publisher.

There isn’t much more I can say that others haven’t. If you have some great concepts for the publishing world, taking your sub-world of mystics into the broader realm, I think you should do it.
I don’t think there are ethical issues. They’re your characters. If you wrote a 900 thou. Word novel on Hatman or Visionary, you’d be wrong unless you got permission, but these characters you’re mentioning are all your creations. This is true for legal issues as well.

I've written a bit more now and I think my problems are more artistic than ethical now.

I do have one question; what if a publisher Googles the characters in the book and finds these stories? Would they be upset with that and not want to publish you? What if your book fans do the same and see these old PV stories? It would be great advertisement for the board, but they’d see a different version of your characters. Is that ok?
I had mine removed cause I didn’t want people to see my horrid writing. But your prose was better. Also, while it’s easy to wipe Ann and Roland from the board, it won’t be so easy to the same with your stuff.