What is the story behind the guy who is the new Lich King? I forget his name exactly, but he appeared to have been a good guy at some point?
It's Bolvar Fordragon, Paladin of the Silver Hand, Commander of the Alliance's combined military forces in Northrend, former Regent of Stormwind, and fallen hero of the Wrathgate. He was thought dead at the Wrathgate, but had in fact survived and been captured by the Scourge, and tortured, with the eventual intention of being made into a Death Knight, much like Saurfang the Younger. However, unlike Saurfang, Bolvar resisted until Arthas's defeat.