Is sylar a threat?

No Claire's blood only has healing properties it would only make Sylar invincible if he had Peters power of absorbing powers. I think he's a threat but with the promise of more villains next season he might also be at threat. It would be good to see more of vulnerable helpless Sylar next season, he seems to be even more evil when he is helpless.

I am so glad Sylar is back. He's what make this series interesting. I don't think Peter alone can defeat Sylar. Peter can't control his power yet. They won't end it soon. Why won't Hiro go back in time to make sure Sylar never existed?? So.. is Nathan really die??

Seeing that season three is going to be called Heroes: Villains, I'm pretty sure Sylar is going to be a major player. The question for me is whether he's going to be more focused on taking down Peter and the gang, or the company, for stealing his powers? Will he side with Adam, or will it be Adam vs Sylar?

he's a big threat to heroes and the whole world.he killed a lot of characters and acquired their power.he must be killed in order the world to be in peace.he must be stopped that way.ya peter can kill him very easily. he can absorb all the powers which means he can also absorbs all the power sylar have.so both of them will be having same powers to fight against with.besides sylar is still not immortal while peter can regenerate like claire.if sylar has peter's power that would be end to the world because he can do whatever he likes.peter started to control his powers already. he just needed to think of the person to acquire their powers.his character will progress more in season 3

Sylar will only be a threat if he kills peter petrelli. We know for a fact that peter is the main protagonist in the series. :D

He's a threat only because he's a cold-blooded killer. I don't think he's invincible due to Claire's blood (he didn't open her brain up, after all).

Hmmmm.......Sylar vs Peter,good vs evil.I hope that season 3 will be more exciting and amazing.. :)

season 3 will have more villians rather than just sylar. I think it will be about uniting the good and uniting the evil and fighting against one another.