But what's even more exciting is the premiere of IT: Welcome to Derry. This brand-new supernatural horror series will start airing on HBO and streaming on HBO Max next month. HBO's IT: Welcome to Derry trailer is absolutely spine-chillingNow tell me that sneak peek wasn't enough to make you peek through your fingers at the screen! He reprises this iconic role in the prequel series. A IT: Welcome to Derry season 2 is also rumored to be in the works, so that's good to know as well.