This is coming from somebody who is not a horror guru (haven't even seen the first IT lol), but I feel like the buzz for It 2 doesn't feel as strong or in-your-face as it was for the first movie. At the same point in time, it felt like It 1 was everywhere and everyone was talking about it. But now, it's just kind of another blockbuster. Kind of like Secret Life of Pets where the first movie's buzz was astonishing, but the sequel was much less. That's not me saying it will drop as bad as Pets. People actually still care and are interested in IT, so Chapter 2 definitely won't open to less than half of the first movie, but...I dunno, marketing just doesn't make the movie feel like a real must-see like the first movie was. But again, I'm not in the horror/King/IT fandom, so what do I know? Would love to be proven wrong.
And to quote the laughing guy from that Rise of the Planet of the Skywalkers trailer, "Something Something Something Mickey's Law. Something Something Something Complete."