For a limited time
* DCUO is allowing former subscribers to come back and enjoy subscriber benefits without subscribing from now until 1/16/2013
For those that have played, the game has had 5 DLC's which have added lots of content, we have gotten 3 new powersets (that come with the DLC's) and a new weapon as well as MANY new Legends characters to PVP with (Steel, Lex Luthor, Superman, Hal Jordan, Sinestro, Power Girl, and more!), PVP instances and a crafting system.
To add to this, DLC (going live sometime in January) will include player housing with thousands of items that will drop throughout the game that you can use to decorate your base (speaking of "pimping out" the game ;) ). Even non-subscribers will have access to the basic hideout. For those that get the full DLC, it also includes PVP matches in your base (actually it's an instanced version of one of the occupants' bases with some of the furniture and fixtures being breakable). There's also league/legion halls that will be coming out during the summer DLC (DLC 8) which will include league/legion base raids.