Was there something that suggests they're actually related for real?

Some physical resemblance to the Petrelli Brothers and the fact that he and Peter are the only two power mimics we've seen could give it some weight (particularly as a comic book plot twist), but I took it as Mama Petrelli playing upon his psychology too.

I was sad when he turned into an icicle.

I think this will be how they (eventually) kill (temporarily) Sylar (again).

Nikki/Jessica/Tracey/Third blonde from the left can freeze him. Then, when he breaks into little pieces, they can put scoopfuls of the Sylar Slushie into separate ziplock bags and keep them separate.

It's like The Judge but more compact and portable with an awesome product placement opportunity.

I wonder what happens to Sylar if he's frozen and then burned, so that the frozen bits evaporate.

It's like The Judge but more compact and portable with an awesome product placement opportunity.

for Slushies or Ziplocs?

Oh true. TWO awesome product placement opportunities.

When Nathan talked to Tracey about meeting Niki in Vegas, wasn't he neglecting a WHOLE bunch of subsequent meetings, including when they were all there and saved New York? Niki, DJ and Micah were there, weren't they?

Right?? I was confused about that too.

So, it’s “Lost” now?

Oh, Lost makes way more sense.

I just wish one of these days they would cut off someone's head on this show. I have been waiting for Sylar's head to be cut off for years.

Indulge me writers.

well...they did cut off Claire's head in Mama Petrelli's dream sequence.

in reality! I want it done! canon!

I have been waiting for Sylar's head to be cut off for years.

But you know that, given the history, his body will just regenerate a new head or something. In fact, it's entirely possible that his head will regenerate a new body. Then there's gonna be two Sylars running around and no one will think they can kill either of them but they'll talk about needing to kill The Sylars a LOT.