it would be totally awesome if we had a heroes game on playstation, computer or wii. following the storyline woulod be kinda hard and it think a company game would be cool too.
you could like catch villains building up from level 1 to 5, maybe play elle (lightning is a great power) or hrg (gun shots is popular too) and work with partners (one of us, one of them)
dunno if one already exists, but i think it woul be a total hit.

They did have plans to develop one:
http://www.msnbc.msn.com/id/19985168/

until:
http://multiplayerblog.mtv.com/2008/11/06/ubisoft-drops-plans-for-heroes-game/

I once read there was a mobile (cell phone) Heroes game but I've never actually seen it