Posted Thu, Mar 01, 2012 by Martuk
The Battle for Earth DLC will be available to US players on PC and PlayStation 3 on March 13th. EU PC players can also play on the 13th, but PlayStation 3 EU players will have to wait until the next day.
The Battle for Earth will be free for DCUO Legendary members and available for everyone else through the in-game Marketplace or PlayStation Network.
Source: DCUO Announcement