It was in a conversation at the 1997 San Antonio Worldcon where the subject somehow turned to Razorback. We had a good laugh talking about the character, and I announced my intention to plug him into a guest-shot in Crossroads . Actually, that was all I'd intended, a throw-away appearance, maybe just seen on a TV news spot. It was more a joke than an idea. But somehow it grew into more than that.
Razorback is still in the background of the book.
We still see him mostly through the eyes of the media, though he does have one important on-stage scene that is vital to the book. He also become more than a joke. Oh, we still have some fun at Razorback's expense, but we get to see him as more than a clown. He's also a closeted mutant, and not entirely comfortable with it. Pretty serious stuff for a guy wearing a pig on his head.