Funny you bring this up since I actually wrote the response track that Jay-Z was going to drop before he was forced at the last minute to record and release "Super Ugly".
Scott and I happened to be at an Underground MMA tournament in Irvington, New Jersey when somehow someone I knew told me Dame Dash wanted to talk. After going undefeated in the tournament and not sustaining a single injury, I talked with Dame, who heard about some of the ghostwriting I did for Lauryn Hill and Mack 10. He wanted me to write a track for Jay-Z to end Nas, so Scott and I wrote a track called "Hiroshima" which would have ended Nas' career. We sent it over to Dame and he said we'd hear the track before it got released publicly.
A couple days go by, and Dame calls me up and asks me what I think of the record. He plays the record, and the first thing I hear is the beat to "Just Doggin'" by Tha Dogg Pound (the one that came out in 2001, not 1996). After I got off the phone with Dame, I immediately called my good friend Suge Knight, and the first thing I said to him was "You're really playing both sides of the fence with this Nas/Jay-Z beef huh". Suge had no idea what I was talking about and I told him about the track Jay-Z was about to drop and he said he would talk with someone over at Def Jam.
A week later, Dame called me back and told me the track has to be shelved because of some "sampling issues". In a way, I'm glad the track didn't come out because the publicity from the song would have interfered with the negotiations I was having with WWF at the time.