There's a new survey going out now accessible from the Battle.net launcher for whoever's selected. Some of it's referring to existing content or expected features (class updates, profession updates, etc.) but there's some new stuff mentioned:
- Class order halls becoming a permanent feature with new quests and progression
- Being able to use your Warband alts as party members in follower dungeons and delves
- Reworked new/returning player experience with lore catch up
- In-game lore guide with some kind of exploration mechanic and associated rewards
- Customizable character select screens, including being able to display mounts and pets
- Adding new customization for existing races and new emotes
- "Variety of PvP opportunities", listed separately from updating BGs/arenas