Dauberman took over writing the script for the movie adaptation of King's 1986 novel, after original writer Cary Fukunaga exited the film, reported Contactmusic.
"I just was more scared of what Stephen King would think. That was the new fear that presented itself adapting it," Dauberman told Slash Film.
"IT" follows a group of youngsters who are faced with their biggest fears when they square off against the evil clown known as Pennywise in Derry, Maine, after multiple children go missing.
"I've been focused on this one and I think everybody's head are in this one until this one comes out, see what it does. Of course when you're writing the script, it's hard not to think about.
"You want to think about ways characters are going to go and all that stuff just to make it feel like there's going to be a story beyond this movie but that's as far as I've taken it," he said.