I could see Barnabas not killing Buzz, but just biting him to bring him under his control. He then tells Buzz to dump Carolyn, get on his bike, and high-tail it out of Collinsport to points unknown. Then, after Barnabas is cured of his vampirism, maybe in the Adam/dream-curse storyline, Buzz, no longer under Barnabas' influence (nor remembering he got bitten), returns to Collinsport to try and court Carolyn again. Carolyn doesn't want anything to do with him and that PO's Buzz. He decides to either get Carolyn back, or avenge his now being rejected. And then maybe he and Adam could duke it out. Carolyn, of course, has no problem with Adam coming to the defense of her virtue, but she doesn't return the affection. So that ticks off Adam even more. Now he kinda understands Buzz's situation, maybe even "associates" with him somewhat. Who knows where this could've gone?
Gerard