The poster for 'The Show Must Popcorn' features a performer suspended in the air by a rope, with their legs and arms spread out in a dynamic pose. The background is dark, and the performer is wearing a white outfit with a blue headband. The title of the event is prominently displayed at the top in bold, red letters, with the subtitle 'Night Live Experience' below it. The poster also includes a list of sponsors and the venue information at the bottom.