While Skarsgard doesn’t want there to be anything as unnecessary as a Pennywise origin movie, he does hope that the sequel can further explore where the clown comes from.
Unlike the Stephen King book on which it’s based, IT largely forgoes offering any concrete explanation of Pennywise and where he comes from.
Most of that may be saved for the sequel, but IT was originally planning to tease one of the earliest days of Pennywise the Dancing Clown.
Bill Skarsgard was on the Playback Podcast discussing the daunting task of playing such an unsettling character and the success of the film.