Upcoming features from the January 19 patch

 Chapter 2 of episode 5 is here

 Wintersday is here and will be the last patch of this year

Upcoming features from the December 1 patch

 Gemstore update today (although they did make some minor changes to the legendary runes and sigils)

Upcoming features from the November 17 patch

voice acting and Champions chapter 1 is here

The new mastery line

Looks like most of today's new stuff is already showing on the API here's the new mastery line:

Name	Mastery Points	XP	Description
Dragon's Boon	1	571500	Destroy dragon minions in Dragon Response Missions to seize Dragon Essence and gain a temporary boost to your stats. Defeating a dragon champion in a Dragon Response Mission allows you to seize a Dragon Boon that can carry this boost into another Dragon Response Mission.
Crystal Forger	2	762000	Defeating a dragon champion in a Dragon Response Mission grants additional materials while under the effect of a Dragon Boon. Seizing Dragon Essence now grants additional might. You can now purchase recipes for Dragon Slayer weapons from vendors in Eye of the North.
Great Champion	2	952500	When an allied faction aids you in a Dragon Response mission, you gain an enhancement to your stats. While wielding Dragon Essence, your critical hits now inflict a condition based on the essence. The allied faction weekly vendor now carries additional items.
Blade of Prophecy	3	1143000	Defeating a dragon champion in a Dragon Response Mission grants additional materials while under the effect of an opposed dragon's Dragon Boon. While wielding Dragon Essence, activating your heal skill now grants a boon based on the essence. You can now purchase recipes for improved Dragon Slayer weapons from vendors in Eye of the North.
Shining Champion	3	1333500	When an allied faction aids you in a Dragon Response Mission, you have improved skill at taking advantage of their assistance. While wielding Dragon Essence, dodging now removes a specific condition based on the essence. The allied faction weekly vendor now carries additional items.
Reins of Power	4	1524000	Defeating a dragon champion in a Dragon Response Mission grants additional materials while under the effect of the Dragon Boon of two Elder Dragons. While wielding multiple Dragon Essences, activating your elite skill now grants might, fury, and stability. You can now purchase recipes for superior Dragon Slayer weapons from vendors in Eye of the North.
Dragon Slayer	5	1714500	The duration of boons granted by Dragon Essence is increased. During the climax of the Icebrood Saga, you can seize Dragon Essence from certain sources.

That's a total of 20 new mastery points and takes 8,001,000 XP to finish

Upcoming features from the October 27 patch

 Here are today's items

Upcoming features from the October 13 patch

 Halloween is here