Not to be negative nellies, but we don't know what some movie studios are thinking — certain titles are just bound to fail. The Nutcracker and the Four Realms? Hunter Killer? We've seen some predictable flops in the past few years. What makes a box office flop? Movies that fail to make their production budget back fit the category. And some movies that do surpass that figure are still considered flops because they spend so much on marketing. Which films are destined for bomb city in 2019? We've got some ideas.