According to the site, this event includes a new hunting area, a pair of additional dungeons, more quests, and "a couple of surprises." The Asheron's Call team boldly states that this will be "one of the most exciting updates" that players will see this year.
The May event announcement ends with a sneak preview of sorts: two pictures showing off new sand textures surrounding a desert town. We've known for a while now that Turbine's been working on updating the game's graphics, so this is a welcome sight indeed. You can read the full article over at Asheron's Call.