According to the Colin Johanson, ArenaNet’s Game Director, GW2 players can expect a massive game release in November with additional content and features:

A number of the activities/mini-games are things we decided to table for a while in favor of focusing on features and areas we felt were more important for the game. That being said, if you like activities, make sure to stop in and visit during the big Halloween festivities running from Oct 22nd-Nov1st!
 
In the short-term we’re currently focused on adding a massive wealth of additional content and features for players to do in the game using the players core skill-bar, which you’ll start seeing in the Shadow of the Mad King update in October as well as our massive November release.
 
Long term we’ll absolutely be adding more activities as well, but we want to make sure we’ve got loads of stuff to do at level 80 in PvP, WvW, and PvE using your characters core skill-bar first and foremost, and we’re dedicating our focus in that area. Down the road, we’ll continue to expand on the scope of activities available in the game as well.