first of all for the people who think peter is sylar, please allow me to humor you. sylar has a beard we suspect, right? when nathan visits peter to talk about HRG "kidnapping attempt", is peter growing...a beard?! =O lol anyway back to my theory
I think sylar is out to kill all of the heroes because he has a religious background and maybe he doesnt believe in evolution. He could see them as souls who must be "saved" in the sense that he must kill them.
kinda half-baked, right? tell me what you think
i just realised too late that i posted this in the wrong place...crap
