After taking 2020 off due to the pandemic, Riot Fest is returning to Chicago for 2021. My Chemical Romance were originally supposed to headline the festival in 2020 and then again in 2021, but after again postponing their reunion tour, they won’t play Riot Fest until 2022. That left a huge gulf at the top of the 2021 poster, which has been filled by none other than Nine Inch Nails.