For the one or two of you that don't know what this show is, it's basically X-Men plus a bunch of other superhero comics set in a "real world" universe and how the super-powered characters deal with their powers and each other. As someone who follows most of the references (read: theived material) and is addicted to the show regardless, I generally make it a point to make fun of the show and its various flaws. Because I'm going to be watching it next week anyway. Sort of a love/hate thing.
Anyway, there are already many games being made for Heroes and they'll probably all be cash-in license games with little originality or charm. They'll also follow the show closely without revealing anything new. Which is fine enough, I suppose, since not all the fans of the show will be willing to play these games for some vital answers to any of the concurrent plotlines going on in the main show.
So with my idea I'll take it in a different direction. Instead of controlling one or more of the protagonists of the show, the game will instead follow a couple of "morally grey" agents in the shadowy anonymous company that is dealing with all these super-powered anomalies. To make sure not a whole lot is given away, the game will follow a newly recruited rookie with a similarly fresh super-powered partner (as is policy). Both of these characters will be new to the universe and you'll control both in turn, depending on the situation. You'll go about business subduing super-powered humans as they're identified by the company's research department (whomever they might be) and follow orders like you're supposed to. Of course, eventually you'll start to ask questions and get involved with the internal politics of the company and the game will start to focus on that after a while - though, again, without giving away too many secrets that will be revealed eventually in the show but also making sure the game gives you some closure on its own story at least. Maybe a non-canon section leader of the company that's gone corrupt will be the game's main antagonist.
The gameplay will be pretty standard, at least in coming to terms with the controls and such. It'll be either a 1st or 3rd person shooter that is set up as a series of missions with targets to be captured in a (preferably) stealthy manner, sort of like a non-lethal Hitman. Of course, most of the targets will either be dangerous (either to you or, indeed, to themselves and bystanders) or are particularly evasive and you won't get the benefit of the deus ex machina that is the Haitian (memory wipe and power nullification? that's a little bit too good, really) to stop them. Your partner's powers will help though (I have yet to decide what these will be, or those of the non-TV show super-people you'll be tracking down). The game will build a database as heroes are brought in, and there'll probably be various hidden collectibles (like XIII's dossier files) that reveal what the company knows about other, more famous characters.
Obviously, you'll be seeing a lot of the show's main characters, either trying to bring them in for testing/tagging/whatever it is the company does or just as cameos in the background or something. Maybe you'll get roundly defeated by one or more of them in fights you're not able to win, because everyone loves those in their video games. Or maybe they'll be tough optional battles in some kind of "non-canon" mode where you can imprison or kill all the show's main characters, continuity be damned (let Hiro go back in time and sort it out afterwards).
So that's just my interpretation of a Heroes video game. Something a little more interesting than simply reliving events of the show with various cast members. My other choice would be a Fighter game, since the powers format and large cast is perfect for one, but that would be a little obvious I think.
