Dol Guldur
Dol Guldur, also known as the Hill of Dark Sorcery, was Sauron's stronghold and base of operations when he worked his sorcery in the wood under the name of The Necromancer. It was located in the south of Mirkwood for over twelve-hundred years in the Third Age.
Gundabad Fortress
The fortess is home to Bolg and his father Azog The Defiler, as well as an army of Gundabad Orcs. As eventually revealed in The Hobbit: The Battle of the Five Armies, Gunbabad is a stronghold with connections to the Angmar kingdom that died out long ago.
Units
In army of Dol Guldur there are several changes from first update. Dol Guldur Pits now have more buildable units.
Dol Guldur Orc Warriors
Dol Guldur Orc Archers
Gundabad Uruk Warriors
Goblin-Town Uruk Warriors
Heroes
Dol Guldur Faction have 5 buildable heroes from Fortress. Another 2 heroes are buildable from Inn, like spiders and Gundabad Warg Riders.
Azog
Bolg
Sauron, the Necromancer
Khamul
Witch-King of Angmar
Spellbook
Spellbook remain as Mordor spellbook. But there are 2 changes. Beside of Balrog, you can summon Smaug and Earth-Eaters.
ANOTHER UPDATE COMING SOON... ELVES
Someone's working long and hard on this!