Blizzard is getting set to launch season 7 for Diablo III (they grow up so fast don't they?) and to help players prepare, they have issued a an article with a first look at what to expect. Here's a bit on what's changed from last season:

Similarly, the steps that unlock Haedrig’s Gift, a special bundle of Set items unlocked throughout the Season Journey, will differ slightly with this season. Rather than tying the rewards to specific steps of the Season Journey, Haedrig’s Gifts are now tied to completing certain chapters. Remember that each bundle will contain two (or, in some cases, three) pieces of one of your class sets.

Chapters II, III, and IV will all reward you with one Haedrig’s Gift. In addition, Chapter IV will also be the reward step for the new Portrait and cosmetic item for Season 7. We’ll go over these rewards in more detail in the Season Reward blog.