As of November 1st, DC Universe Online will be Free to Play. http://www.dcuniverseonline.com/en/free/ If the methodical battles of City of Heroes is not your thing, or you want to play on your PS3, then download the client on Tuesday and set yourself up.  DCUO is designed to be more fast action than its competition, with button mashing battles.  You can read an extensive multi-part review of the game on Kotaku here: http://kotaku.com/5738386/dc-universe-online-mmo-log-part-one-making-a-name-for-myself-+-and-another
I'll be checking it out on the PS3.  I've long wanted to try a decent MMO from the couch, using just a game controller.