NCSoft made a recent announcement regarding the servers that will be active in the launch of City of Heroes. Here is the post from their site:
We know you've wanted information about the availability of servers. So, without further ado, here are the names for some of the planned CoH servers to help you with all your game playing and team coordinating needs. Please keep in mind that not all of these servers may be live on launch day, and it's also possible that more will be live. The final exact server setup will be based on load demand and server configuration.