Graspop Metal Meeting 2020 ha anunciado un total de 74 bandas de golpe. El festival belga ya había anunciado previamente a Iron Maiden y Judas Priest logrando juntar a las dos leyendas del heavy británico en un mismo cartel. En la extensa tanda de confirmaciones se pueden encontrar bandas como Deep Purple, Foreigner, Korn, Mercyful Fate… Grupos destinados a copar las posiciones de privilegio del cartel.
Lista completa de las bandas confirmadas: August Burns Red, Airbourne, Alcest, Alestorm, Alter Bridge, Amorphis, Anathema, Anti Flag, Baby Metal, Battle Beast, Beyond The Black, Body Count Feat. Ice T, Boston Manor, Bury Tomorrow, Chelsea Grin, Creeper, Deep Purple, Deez Nuts, Deftones, Dimmu Borgir, Disillusion, Disturbed, Dog Eat Dog, Dool, Down, Dream State, Dying Fetus, Enter: Shikari, Exciter, Foreigner, Fields Of The Nephilim, Fu Manchu, Gaahls Wyrd, Good Riddance, Heathen, Heaven Shall Burn, High On Fire, In Extremo, Kadavar, Killswitch Engage, Killing Joke, Korn, Lagwagon, Mayhem, Me And That Man, Mercyful Fate, Misþyrming, M.O.D., Motionless In White, My Dying Bride, Naglfar, Obituary, Of Mice & Men, Opeth, Our Survival Depends On Us, Paradise Lost, P.O.D., Powerflo, Powerwolf, Sacred Reich, Sepultura, Shvpes, Silverstein, Slapshot, Soen, Steel Panther, The Great Old Ones, The Offspring, The Vintage Caravan, Thunder, Tribulation, Vltimas, Wayward Sons y Wednesday 13.
