Looks like at least one Heroes spoiler is true:
Adrian Pasdar will, indeed, be sporting a beard for Heroes season two.
Here's a photo of the man who portrays Nathan Petrelli, during a stop in Monte Carlo as part of the Heroes world tour.
Rumors have swirled that Nathan's face is full of scars after his brother blew up. Hence, the need for some serious facial hair in order to cover them up.