So I sped up the end of the trailer on YouTube to 2x speed...the part right after you hear "Something's coming." and you know what? At normal speed, that low, rumbling noise at the end sounded like wind or an atomic blast or even a train lumbering by overhead. But at 2x speed, it sounds to me like something swimming through water. I can even make out bubble noises. It's kinda like when you submerge yourself in a pool and you can hear all those bubbly/swishy noises. And we all know the monster from Cloverfield came from the sea. Easier to hear with headphones on. Also interesting that this sound is played right after "Something's coming." but I'm most likely grasping at straws here though, lol.