What a friendly site! *waves to everyone*
If Sky are on board with the finance, I think the production values of the next adaptation will be up there with Going Postal. Sky recently announced they are keen to adapt many more novels for the small screen with Skellig, Strikeback and the Discworld the highest profile ones; I have no idea if they intend to do another Discworld novel, but I'd be very, very surprised if they didn't.
I do apologise for my rambling, but I think the point I'm trying to make is that as Sky have plenty of cash the next adaptation will look fantastic, whatever it turns out to be