DC Universe OnlineÂs (DCUO) Game Update 16 (GU16) deployed earlier today and the new Tides of War summer event is now underway. The new event will task players with choosing a side and aiding either Aquaman or Ocean Lord in their task to obtain the Atlantean crown.
In addition to the new event, GU16 also brings new vault items, Alert and Duo changes, several bug fixes and other game tweaks. Patch notes for GU16 are available on the DCUO forums.
Source: DCUO GU16 Announcement