Dhorak Keep: yes it will be making a comeback... in a way. There will be no separate location. The place where Dhorak Keep once stood had a village built very close nearby. It is slightly more fortified than most villages, due to the raids by renegade bands of Dark Knights after the destruction of the keep itself...
As for Akhad Thell: I did not start playing M&B until version .808, so I suppose I consider older versions like unwritten history. Akhad Thell was long gone by then.
Incidentally though, there are basically three more spaces for lords in the new faction, to give it as many lords as the rest. I have been entertaining ideas, but they pretty much have to be from greek mythology, and underworld related. I think I have pretty much exhausted the list...
Typhon, Father of All Monsters
Echidna, Mother of All Monsters
Cronus, Old King of the Titans
Ascalaphus, Orchard Master of Hades
Erebus, God of Darkness
Nyx, Goddess of Night
Empusa, Devourer
Pyriphlegethon, God of the River of Fire
Euronymous, Flayer
Cocytus, God of the River of Tears
Thanatus, Beheader
Acheron, God of the River of Pain
Epiales, Tormentor
Melinoe, Whisperer
Rhadamanthys, Judge of the Undead
Minos, Judge of the Undead
Aeacus, Judge of the Undead
Triptolemos, Judge of the Undead
Perhaps the fates or "Moirai"?
http://en.wikipedia.org/wiki/Moirai
I like the idea. Something further for the "Prophecy" character creation choice? Hmmm... *Sounds of tinkering...*