Green Lung, Creeper, Brutus, Malevolence, Zeal & Ardor, Bob Vylan, Dinosaur Pile Up, Bleed From Within, Boston Manor... all names we hope to see headline our festivals in the future.But what does it take to get there and why does the path to the top of the bill seem so clear at 2000trees, yet so complicated at ATG and Damnation? Gav and James also have a bash at booking a stage for the other's festival, from the sublime (We Lost The Sea and Tomb Mould) to the ridiculous (Moon Tooth?)...