May 12th 2007 8:15PM Well the info about Ner'zhul is not entirely correct. He was indeed very much alive when Gul'dan created the shadow council and the whole ordeal with Orgrimm Doomhammer. Ner'zhul never really earned the trust of Kil'jaeden, still having doubts of how the orcs were being affected by the bloodlust the Burning Legion afflicted them with.
Gul'dan however was more than eager to sacrifice his people for gaining powers of his own. And as such Ner'zhul was pushed back into the shadows and not a real force to be reckoned with, until the end of WarCraft II and the expansion Beyond the Dark Portal.
After Gul'dans defeat and Orgrimm defeat at the end of WarCraft II, Ner'zhul was put as Warchief of the Horde, leading the campaign from Draenor. At the end of the campaign he attempted to open a number of portals to other worlds which only ended in destroying Dreanor and creating Outlands. Ner'zhul tried to escape through one of the portals but was captured by our very own Kil'jaeden which in turn created Ner'zhul into The Lich King, a pawn in the Burning Legions next plan in taking over Azeroth. He would later rebel against his demonic masters and merging with the young Death King, Arthas, but that is another story.
Summary of corrections: Ner'zhul was very much at large, and very much an orc while Gul'dan was corrupting the Horde and rampaging against the humans. It was firts after the events of WarCraft II that he became the Lich King, and a slave to The Burning Legion and a major factor in WarCraft III and World of WarCraft storylines.