Since the release of Aion 4.0 part 1 in December 2012 and Part 2 in January 2013, players are impatiently waiting for 3rd Part which is planned to be released at 13th March 2013 on Korean live servers. Soon this update will be release on K-Aion PTS, but meantime Korean developers public first info about the update on theirs 4.0 blog!
Take a look!