[quote name='Ledhed']They're about as metal as you could be, pre-All-Those-Bands-You-Listed. They, along with good folks like Zepp and Sabbath, are pretty well responsible for any metal you hear today, or in that little list of yours for that matter (excluding Sabbath of course; they were doing it before anybody).[/QUOTE]
"As metal as you can be, before..." doesn't necessarily make them metal. It just means metal had not really emerged yet, or was not yet prevalent. By this logic, I could claim the Beatles were "as metal as they could be" in their time (...I hope we can agree that the Beatles are not metal, at least).
But you're right, the thing to focus on here is that there will be more Guitar Hero goodness than anyone expected, and that's just plain awesome.
[quote name='evanft']I hope they make the metal version REAL metal. I wanna play some King Diamond, Slayer, Morbid Angel, etc.[/QUOTE]
Hell yeah.