I wouldn't be surprised if this happened with The Fragile somewhere down the line. There's obviously way too much going on with that album for NIN to ever want to do it as a surprise, and I'm sure Trent likes the idea of doing it live, so a dedicated tour of Nine Inch Nails performing The Fragile would be the way to actually make it happen. I get that's kind of cliche these days and thought of as something only "old bands" do, but fuck it, there's no question there'd be a rabid audience for it.