Just some random information I decided to research;Burning Crusade Trademark was filed in May 2005, released January 2007Blizzcon Announcement Oct 2005Lich King was trademarked July 2007, released November 2008.Blizzcon Announcement August 2007Cataclysm was trademarked June 2009, Released 2010.Blizzcon Announcement August 2009A pattern, maybe maybe not. Just some info to enjoy.![]()