Update 4 is headed to DCUO players this coming Monday, August 1st. Expect some downtime while SOE integrates the new content into the live game. You can expect patch notes the same day.
All PC and US Playstation 3 servers will be down Monday August 1st at 8AM PT for maintenance to introduce Game Update 4. Server downtime is anticiapted to be approximately 2.5 hours and patch notes will be made available during that time.
Check out the news at the Official DC Universe Online Website.