10. 10 Cloverfield Lane's International Marketing Showed The Aliens
After escaping from the bunker of crazed survivalist Howard Stambler (John Goodman), protagonist Michelle (Mary Elizabeth Winstead) finds herself facing one final challenge: a bio-mechanical alien spaceship with a gigantic, toothed maw, which subsequently attempts to devour her.
With the help of a molotov cocktail, though, she's barely able to escape that fate.
How It Was Spoiled
Though 10 Cloverfield Lane's title made it clear the film took place in the Cloververse, as originated in 2008's found footage monster flick Cloverfield, the state-side marketing did a great job concealing the presence of aliens altogether, focusing instead on the post-apocalyptic survival aspect.
And while producer J.J. Abrams clearly had an active hand in how the film was marketed to the west, that clearly wasn't the case abroad.
A poster for the film's release in Thailand blatantly showed Michelle running away from the alien ship, and if that's not bad enough, an international trailer revealed several alien-centric money shots from the climax.
No $15 million sci-fi movie needs a marketing push this aggressive, and for those who saw the spoilerific marketing before watching the film, it needlessly gave away what was a genuinely jolting and surprising finale.