from lodestone previuous announcement:
http://lodestone.finalfantasyxiv.com...56f2a6ed113237

"FINAL FANTASY XIV producer/director Naoki Yoshida will be attending Gamescom 2012 in Cologne, Germany from Thursday, August 16th to Sunday, August 19th. He will be delivering a series of exciting presentations during the event, including a world-first gameplay demonstration. Fans will also have a chance to get his autograph at special signing sessions on the 17th and 18th."

I suppose that ARR presentation is on 16th? Cuz 17th and 18th are for interviews and autograph session..