It’s been 15 years since the sweet, shaggy slacker romcom Adventureland played at the Sundance film festival – and if that may seem a mere blink of an eye to the small but ardent cult of millennial filmgoers who took the film intensely to heart, its two stars returned earlier this month to the snowy mountains of Utah to remind everyone just how long it’s been. With four films premiering between them, actors Kristen Stewart and Jesse Eisenberg were separately the talk of this year’s festival: at the opening ceremony he presented her, at the grand old age of 33,...