Arenanet's Colin Johanson has posted a blog about what the team is planning to add to Guild Wars 2 in the second half of 2013. He brings up multiple topics and how they've transitioned from one Living World team with very quick turnaround to four Living World teams which should help ensure higher quality.
Here are the key topics Johanson deals with in no particular order: Living World and the Two-Week Release Schedule, Progression Advancement, New Skill and Traits, Rewards - Champion, Dungeon Complete, Crafting Material and more, New Crafting Tier and WvW + PvP.