You guys are silly,
Sylar did not become a cockroach... the blood was trailing to the sewer where it was going down... the cockroach was just around for dramatic effect, a metaphor for Sylar but not Sylar himself.. thats how i see it.
Also, was anyone else REALLY pumped that Bennett's name is Noah?? Haha i was so pumped, best name ever, I'd name my son Noah now. (apparently it's biblical...?)
(maybe Noah is a metaphor like the cockroach... in the way that Bennett brought all the people together... to save them from the flood/ extermination? HA)
Anyways, I'm excited about the Hiro being in Feudal Japan bit, that'll be really cool, he'll probably learn from Kensei. Also, man what a way for Nathan to go out as a hero eh? It'll be interesting to see how that all turns out.. because Nathan will be dead now, he was right there with the explosion, Peter might be able to pull off an "Iron Giant" where all his pieces come together again.
One thing i thought could be cool... is if they did Kill off the petrellie's because they were season 1's protagonists, but season 2 will focus on new people, new protagonists (with crazy twists and connections for the fans of previous seasons) Making the petrellies Martyrs and ultimately , better heroes.
(ALSO, THE BOOGEYMAN IS NOT THE "guy who can see her", THE BOOGEYMAN WAS SYLAR... just to correct you guys who were calling this mystery badguy (of season 2) the boogeyman, becuase Sylar is "the boogeyman")