I've finally got a concept, still ironing it out but the gist of it is:
My villain was a cyclist, obsessed with performance and will do anything that will give him the edge. He was very frail as a child and was looked down upon by the other kids. Now the tables have turned and his hate makes him strong. That and the drugs, witch are the reason he doesn't compete anymore, having been banned for life by the Anti Doping Committee. In his quest for performance he has succumbed to performance enhancing drugs, without witch he would struggle to even breath, the key to his power has locked him in cage, eating him alive. Slowly dieing in his empty shell, madness draws parallels in his mind, just as people formed the path of his destruction, so too is the planet slowly being to choked by the emissions of countless cars. The weak rule the world, while the strong are seen as outcasts. Out of the corner of his eye he sees the glint of a syringe. His purpose is now clear, in order to save humanity from itself, it must be culled. With the syringe in his hand, he walks into the night. Judgement begins.
