Welcome to the site robhull1!
It's a nice idea, but I'm trying not to think about an end to Discworld. Although I have to say, the last couple of books have felt a bit like a winding down and tying up of loose ends.
Terry seems to have a lot of future projects, but nothing concrete on Discworld. So I guess we'll have to wait.
"Goodness is about what you do. Not what you pray to."