jon1701 said:
Hope this is true.
I believe Temis called this some time ago. As did I.

Weeeiirrrd, huh?
I wish I could go thru the archives to find out how long ago I started yakking about it. I remember when I first saw the guy on 24, my immedate thought was, well, if they ever need to recast Spock, there's your guy. And S3 was in 2003 - the Xindi Arc had just begun on ENT, and there was no inkling that Kirk or Spock would ever be revived. I thought it was sheer wishful thinking at the time.
No fresh rumors about Kirk yet, huh? It would be funny if they went for Michael C. Hall - another excellent actor playing a serial killer. Seriously, despite the weird coincidence, those two guys would be about the best casting I could imagine.
So far, this seems to be a resoundingly popular choice amongst us hard-core.
And we're the people who are supposed to be issuing DEATH THREATS!!!! against the infidels willing to besmirch the legacy of the holy Shatner and Nimoy with their odious and undeserving presence!!!!

Aww, and here I was looking forward to a good old fashioned internet jihad. If they don't frak up the casting, they'll spoil all our fun.
Pulling Spock off won't be easy for any actor. His every action will be studied and criticized more than any other performer in that movie. Quinto can do sinister ... he can be creepy to a degree that makes Anthony Perkins look like a momma's boy. But Spock is something completely different.
Sylar is a character who takes a lot of acting talent to pull off because the writers haven't been a whole lot of help. When you think about the character logic that we've seen so far, and envision it written on the page, a lot of problems crop up. The character really hasn't been nailed down; if you follow the arc, Sylar is kinda all over the place, as the story demands. And he could have come off as a groanable cliche in the hands of a less imaginative actor. The fact that Sylar works as well as he does - seems like a coherent, believable character and not someone we've obviously seen before - is more due to to Quinto than to the Heroes writers. Generally the writers on that show are good, but Sylar isn't the best thing they've come up with by a long ways.
So I think Quinto has the talent to find the core of a character and bring him to life. And you're right that Spock is a tough role, demanding a lot more subtlety than usual, and that the character has to be played on two levels, the cool surface and the hot volcanic interior at all times, and the interior can only be hinted at but must always be present. A lot of Trek actors who play Vulcans only get the surface level, and they're boring but every so often you see one who understands the role and can pull it off.