Mark your calendars, sneakerheads. LeBron James' twelfth signature sneaker with Nike will be unveiled next Tuesday, September 16. The LeBron 12 will be officially revealed at a special launch event similar to what was done for Kevin Durant's KD 7. At this time, it's not yet known if there will be a live broadcast to go along with the private event. With the NBA season just a month away, expect the LeBron 12 to hit retail stores soon after the unveiling.