NCsoft and Paragon Studios officially announce the City of Heroes Going Rogue expansion revealed earlier, filling in some of the details on the Bizarro-world alternate universe it will introduce to the super-powered MMORPG. Here's a bit:

In the Going Rogue expansion, hero and villain characters will become immersed in the new parallel universe known as Praetoria, which is governed by Tyrant™, the evil incarnation of the game’s main protagonist, Statesman™. As gamers search for Tyrant and the rest of his Praetorian guard, implacable foes and fierce resistance will arise to face them from all sides, causing heroes and villains alike to question their loyalties.

City of Heroes Going Rogue will introduce a new alignment system that helps players explore the shades of gray that lie between good and evil. For the first time, hero characters can become villains and vice versa, enabling hero archetypes to cross over to the Rogue Isles™ and villain archetypes to experience Paragon City™. Clearly marked missions, in addition to behaviors and decisions made by the player, will move a hero’s or villain’s moral compass, which could eventually change the hero’s or villain’s alignment. Going Rogue will also introduce two primary new fictional characters representative of this alignment shift in the game’s lore: Maelstrom, a pistol-wielding hero gone rogue, and Desdemona, a demon-summoning villain who has been redeemed.