Maps to reveal location of chests and dungeons. Dungeons to be new content designed for a combination of classes from all Disciplines. Planned for after version 2.0.

Free Company-specific content to earn points used to improve company rank, gain access to personal estates, perform cooperative synthesis.

Campaign of battles against the dragon horde in the defense of Ishgard, with participation possible as any of the four Disciplines.

http://wdl.square-enix.com/ffxiv/dow...Content_EN.pdf

Also mentioned in one of the interviews that the Estate and Housing systems will have a strong DoH/DoL focus.