On July 4, 2008, the first conceptual art was released for the game.^[4] The first trailer was released on July 14, 2008.^[5] New concept art and screenshots for the game were released the next day.^[6] The developers held a Q&A on the same day, where players could ask questions about the gameplay and other aspects of the game.^[7][8] Other interviews and information about the game have also come online.^[9][10] It was revealed on their MySpace page that the first public demo of the game would be shown during Comic-Con International. Other interviews have also been found regarding the game.^[11][12] Information about the games' reveal at Comic-Con have also surfaced.^[13] A making of DCUO video has been released.^[14] DCUO was also shown and playable in Pre-Alpha form at major conventions throughout 2009, such as New York Comic Con, E3 and Comic-Con International. The game was released in January 2011.

According to a Sony spokesperson, the revenue model will be subscription based with a user cost of $14.99 per month^[15], rather than using microtransactions.^[16] Eurogamer.net has confirmed for the UK the subscription will be £9.99 a month, £27.99 for three months, and £49.99 for six months. The cost for Australian subscribers is $19.95 AUD despite the relative parity between the Australian dollar and the USD.