News/20080716
From City of Heroes: Rebirth - Wiki
City of Heroes and Villains Merged
NCsoft announced today the official merging of City of Heroes and City of Villains as a single game. For quite a while, the full game has been available to players who purchased the Good Versus Evil Edition or to players who purchased licenses for both games separately. In December 2007, a one-time full access grant was made to players who had a license for either game. With this merge, all current subscribers who had only one of the games (City of Heroes or City of Villains) now have access to all features of both games.
In addition, new features announced include improvements to supergroup bases and raids, an offline character reward system, and the previously announced Mission Maker.
Read the official announcement for complete details.