No the Big Four are:MetallicaMegadethAnthraxSlayerIron Maiden never made thrash so its simply impossible to be in the Big Four. The Big Four is about the four biggest Thrash Bands in the '80s.Oh and I disagree with you Angel, about the slayer sucks thing. But hey, its a word from a nu-metal disiple that likes Korn (that is not even metal.) towards a Thrashers, so I can't bother it Graspop has not much real metal this year. I aint going. maybe next year.