Production Director John Hight: We're working on two major systems for the 2.1 release, first is Seasons. Seasons are a shard of the existing game where everything is a fresh start. You start with a brand new character without access to any of the gold or items you collected with your primary account for the length of the season. We plan on creating brand new, powerful legendaries that only drop within in the season. After the season ends, all of your progress — your experience, your items, your gold, etc. — will be rolled into the main roster. The goal is the fresh-start feeling — so many changes and tweaks have happened since the launch of Diablo III — it is really energizing and fun to recreate that 'first-moment-in-a-new-game' feeling.
We've also added leaderboards. Players can race on a variety of metrics to try to become the leader in their region or the top of their friends and clan lists. That friendly competition angle lends itself really well to Diablo games.