The Champions of Light
This faction, whose only two known members are Jamella and Halbu, the Merchants of Light, is difficult to comprehend. They are aligned with Heaven, though may not be directly a part of it. They seem to be immortal, but appear to be humans. They may have been humans favored by renegade angels such as Yaerius or Inarius, who were then granted heavenly powers and accepted by Heaven. They may have gained trust with Heaven during some event so far untold. They may also be native to the Island of the Sunless Sea, though officially it does not exist.
The Children of Bul-Kathos
Once a proud, powerful collection of tribes, the barbarians of Arreat have since found themselves in complete disarray after the destruction of the Worldstone and their land. Many died with their mountain, and most remaining tribes have reverted to primal behaviors or have succumbed to the demonic corruption that Baal left behind. Most barbarians of sound mind wander aimlessly and alone. Perhaps their people can still be reclaimed and brought to its former glory.
With the demonic corruption of Mt. Arreat purged, the Druids may reappear to aid their Barbarian brothers in rebuilding their culture and society and help give meaning back into their lives.
The Hand of Zakarum
Once the righteous crusaders of the Zakarum Church, many paladins came to perceive their Church's methods and ideologies to be corrupt. They defected from the Church and created their own order, known as the 'New Order of Paladins.' Their new creed was to protect the innocent. The current whereabouts of any paladin, devout or rebellious are unknown. However, decades before the New Order of Paladins was created, a special forces team of paladins, called the Crusaders, marched to the East, unlike the rest of their brothers, and have recently come back into action.
See Religions > Zakarum, Nephalem / Humans > Kormac
Holding divine control over creation, Heaven will eventually destroy it all unless conflicted with an opposing force. Additionally, it is unknown how Heaven as an entity will react to Malthael's current philosophies.
Thought to have died out with Deckard Cain, the Horadrim seems to have been recreated by Tyrael with the job of hiding the Black Soulstone. At least one member still survives.
The Merchants Guild
Similar to the Thieves Guild, it is unknown how far it spreads, but it definitely exists in Kingsport and likely throughout Westmarch. They likely have a massive influence politically wherever they exist and likely have a bounty on Lyndon's head.
See Nephalem / Humans > Gheed, Lyndon, Lyndon's Brother
The Priests of Rathma
Known more commonly as the Necromancers, they dedicate themselves to neither good nor evil, but no both and neither at the same time. They are committed to a philosophy called the Balance, in which both good and evil play their equal and opposite roles on creation. With Hell leaderless, and Sanctuary and Heaven aligned, it is certain that the Balance has been greatly altered and many speculate that they will have a unique view of Malthael's current philosophies.
See Nephalem / Humans > Linarian, Zayl
The Thieves Guild
After the death of Nigel Cutthroat and your allegiance with Lyndon, it is likely that the Thieves Guild has a mark on your heads. It is unknown how far the guild spreads, but it at least exists in Kingsport. It would be likely that it stretches across Westmarch, Khanduras and Aranoch.
See Nephalem / Humans > Elzix, Lyndon
This order of mage slayers, better known as assassins, are very mysterious. They undoubtedly still exist, but with all major threats currently extinguished, they may not appear unless rogue magi begin to threaten Sanctuary. It is unknown how they would feel about the rebellious Wizards of the Yshari Sanctum. Some speculate that some members of the order have left and joined the more contemporary group of the Demon Hunter.
See Nephalem / Humans > Adria, Bartuc, Horazon
Edited by Chris#1235 on 8/21/2013 9:23 AM PDT