The next IT could go super meta and feature Pennywise turn into famous Stephen King villains like Christine, Cujo or The Green Goblin Truck from Maximum Overdrive, but as Andy Muschietti said, that meta approach is probably best avoided.
In the 2017 version of IT, Pennywise changes into forms designed to disturb each of The Losers’ Club in unique ways.
I love the story and I love how Stephen King basically makes a portrait of childhood in the ’50s.
IT could have featured cameos from famous ’80s movie monsters, according to director Andy Muschietti.