only if Ozzy decides not to fuck us over again and cancel the UK Ozzfest & replace it with a shit stadium tour having his daughter as the main support
i'd like to see Slayer on there, only because they always er... "slay" live
as for others, id tell them to take the lead from say the Inferno festival and have the likes of Decapitated, Zyklon, Red Harvest, Vader, Aborym, that kinda thing so there's something for everyone and everyone extreme