It's just so plausible, isn't it? Brr. Peter and Sylar are clearly meant to mirror each other (I don't think it's a coincidence that Sylar gets super hearing the same week Peter masters invisibility, making him effectively immune to invisibility). Peter is everything Sylar wants to be, and he does it without even trying. If anyone on Heroes is going to develop a real, comic book style archenemy relationship, I think it's those two.

I worry about Claude. Mentoring the young hero is always incredibly dangerous, and Peter is way too dumb to see a threat coming.