Men in Black 3 gets a surprisingly 'okay' full trailer.

After the somewhat overly cryptic first teaser, this full trailer does a solid job of explaining the premise without overtly spoiling much of the plot.  Agent K (Tommy Lee Jones, now 65 years old) is apparently dead due to a ripple in time, and Agent J (Will Smith, now 43 but still looking not a day older than 28, which is how he was when the first Men In Black came out in 1997) must travel in time to the 1960s to discover some world-changing secret that apparently only K knows.  The weirdness of the ages is fully accounted for, as the post-title joke openly acknowledges the weirdness of 44-year old Josh Brolin playing a 29-year old Tommy Lee Jones.  Kudos to Sony for not revealing much more than that.