IT Chapter Two is poised to be one of the biggest films of the year, which is pretty good considering that the horror movie doesn't come as part of a superhero franchise and isn't a re-do of an animated classic. It is, however, a star-studded sequel that caps off the adaptation of Stephen King's story about a group of small-town kids who battle an ancient evil in the form of a shape-shifting clown. Leading the charge for the adult Losers who return to Derry is James McAvoy's Bill Denbrough. He'll be …