In an interview, Steve Gibson stated that there is no dubstep in Borderlands 2. I am extremely grateful for that, because I personally despise dubstep and believe that it would detract from the experience for me. I just hope that Gearbox doesn't go back on that.
Onwards, I heard someone talking about the possibility of Duke Nukem showing up in Borderlands 2. I truly hope that this is just a rumor, not just because the cameo would be extremely forced, but because Duke Nukem Forever was an absolute critical and commercial flop, and I would hope that Gearbox would try to put that mess behind them. Duke could only damage the Borderlands franchise, and I hope that Gearbox realizes this.