Google tells me that I'm about a year and a half behind on this, but I like the fact that I didn't know this going into the film as then I got to experience the unsettling realization firsthand.
Sylar, the serial killer in Heros season 1 (played by Zachary Quinto) is now Spock in the new Star Trek film. Ok, Sylar isn't there but those Quinto eyes have an intensity that both Sylar and Spock share, and underscore the uncomfortable fact that the characters are two sides of the proverbial coin. An ambiguity that the always brilliant J. J. Abrams seems to thrive in.
According to this article
Heros creator Tim Kring thought it was cool too. It is a fun circularity as Sulu shows up in Heros.