In early 2006, between the final Dark Tower novel and Lisey's Story (a true all-time great), Stephen King released a bad book called Cell. In 42 years of publishing, he's turned in very few bad books; this is one. Cell's got its proponents—who generally hate the cliffhanger ending, one of the 350-pager's few redeeming qualities—but King should've just cut it off at the 20th page and published a fun short story.

So if you're wondering why the Hollywood adaptation's been in development hell for a decade, there's your first clue. Your second clue is probably this trailer. While it's neat to see John Cusack and Samuel L. Jackson—stalwart saviors of subpar genre films—teaming for a second King movie, following 2007's 1408, it just...doesn't look necessary. Not in a world with two Walking Dead shows on TV and at least a few new zombie movies every year. Not when it's based on this book. Not even if King co-wrote the screenplay, a role he doesn't often take.

'Cell' Trailer: One of Stephen King's Least-Good Books Is the Newest Zombie Movie