Comic-Con: The 'Heroes' panel is packed with Season 3 spoilers

• The action begins with a "future" Peter (Milo Ventimiglia, pictured) coming back to modern day in an effort to shoot Nathan (Adrian Pasdar) before he exposes their secret powers to the world.

• Matt (Greg Grunberg) discovers future-Peter's real identity — but is banished into the middle of nowhere before he can do anything about it.

• Mohinder (Sendhil Ramamurthy) finally isolates Maya's (Dania Ramirez) powers in chemical form, and uses a syringe to inject himself with the magic elixir rather than give the girl what she wants — freedom from the hell of her super-human affliction.

• Sylar (Zachary Quinto) traps Claire (Hayden Panettiere) in her house and literally rips open her head to steal her thoughts and ability to defy death, while...

• Hiro (Masi Oki) disobeys his dead father's command and opens up the office safe that holds part of a formula that, if completed, could destroy the world. Of course, it's confiscated within seconds by a mysterious, time-traveling blonde.

• There are also brief appearances by Niki (Ali Larter) — now looking professional and dating (or married to?) an older man — as well as Noah (Jack Coleman), who's locked up in an inescapable prison cell. Oh, and keep an eye out for a new animated image (painting?) that look likes the Earth is cracking in half.

• And did we say a newly powered-up Mohinder gets to finally kick some ass?

The screening left little time for and a Q&A session, but that didn't stop the entire cast from coming on stage to wave and blow kisses to the fans (one young woman even got a hug from Ventimiglia). The crowd roared, especially since most had been waiting hours for the panel. One even waved a sign that said "Milo we camped out 4 U all night."