We know that KPA are the geniuses of sound processing. So how about a stompbox type effect that does the kind of thing the variax guitar does. Maybe it needs extra processing power so it would take up multiple effects slots. But it would be very cool to have an effect that goes from humbucker -> single coil sound, or to sitar, acoustic etc.
I'd say that kind of processing is impossible but if anyone's going to figure out a way, it's going to be Kemper.