The 4.1 update for Dungeons & Dragons Online: Stormreach looks to be a big one.
There are new solo quests, Dragonmarks, a change to resurrection shrines, many UI changes, monster AI changes, combat changes - including a change to the Rogue Evasion ability, and many more additions and changes.
Head over to the 4.1 Release Notes thread to see the entire list of changes for the next DDO update.