This will suck trememendously
(1) The first film had the advantage of working off a draft by director/writer Cary Fukunaga (True Detective, Maniac, Beasts of No Nation, Sin Nombre), which was rewritten by Chase Palmer and Gary Dauberman.
It: Chapter Two is only being written by Gary Dauberman ... the same guy who wrote The Nun and the two Annabelle movies. Awful films.
(2) The first film used the strongest material from Stephen King's book, which flipped between the kids and adults stories. It: Chapter Two will MOSTLY be about the adults, whose lives and encounters with Pennywise are way less interesting.