Men in Black 3's production was reportedly plagued by long shooting delays, repeated script problems, and the difficulties of parking Will Smith's wacky, novelty-sized trailer, but you won't see any of those issues making it to the screen in the sequel's first trailer. Rather, this two-minute teaser adheres as rigidly to the MiB formula as a hypothetical pilot for the CW's Men in Black: The Series (note: this will probably not remain hypothetical for long). The Letter Men put on their sunglasses! They hold up their silver accessories! Aliens possess increasingly quirky traits! Remember those things? They're back! It's only at the trailer's conclusion that the sequel reveals the added conceit that separates it from its predecessors: now there's also time travel. Because, as the Star Trek films have shown us, even a limitless universe of alien storyline options only carries you through so many films before you've got to start going back in time to save Tommy Lee Jones/Spock/whales/whatever, right?