Spoilers Ahead!
I received a copy of the Heroes comic book that was handed out at Comic Con 2008 as part of the Create Your Hero promotion. It’s not very long, but very enlightening. It contains some pre-season info on some of the new characters that are featured in the upcoming season (at least, the “live” picture ads show these characters).
An expanded version of this is online, so you can view the video if you like.