• Mobile Crafting Station (100 or 5/400 ): Now you can craft new items nearly anywhere in Tyria! Create a Consortium Mobile Crafting Station of your choice, which you and your allies can use for up to 15 minutes. Works in all weather!
  
• Consortium Mobile Mystic Forge (50 or 5/200 ): Forge here, forge there – forge everywhere! Create a portable Mystic Forge wherever you like. This handy consumable gives you and your allies access to a mini-Mystic Forge for up to 15 minutes!
  
• Black Bear Cub Mini (400 ): Smaller and considerably less aggressive than the adult version, this Black Bear Cub Mini will fearlessly follow you everywhere from The Mists to the Maguuma Jungle!
  
• Last Week for Braham and Rox Weapon Skins: This week is your last opportunity to pick up the Braham and Rox weapon skins! Don’t miss out on your chance to commemorate the major figures of the Flame and Frost saga!

• New Improved World XP:  ArenaNet has improved the award system for World XP in World vs. World, allowing players to gain rewards for a much wider range of activities in the Mists – everything from destroying siege weapons, repairing walls, escort missions and more.
  
• Greater Variety and More Rewards in WvW: Earn World XP for playing the way you want with WvW daily achievements. Each time players gain a new World rank, they’ll earn a bonus chest with WvW loot.
  
• New WvW Abilities and Matchup Changes: Choose to become even deadlier in The Mists with new abilities like Burning Oil Mastery or new ranks in Defense Against Guards. WvW matches allow players to face new opponents in new matchups and test their world’s skill against more foes.
  
• Custom PvP Arenas and Spectator Mode Beta: Based on feedback from beta players, ArenaNet has been able to fix bugs and further improve these new features. Now players can extend the time of their favorite custom arenas with added Custom Arena Time Tokens in the Gem Store.
  
• Introducing Infusions and Ascended Gear in WvW: ArenaNet has introduced the ability to purchase Ascended rings and amulets and to upgrade WvW abilities with six new Infusions that give players’ characters special WvW bonuses. Just speak to the new Laurel and Badge Merchants on each map.
  
• New Southsun Cove Rewards: Players can find their very own Mini Reef Rider – a loyal floating friend available only until June 11. Dedicated defenders of the Southsun settlers can also earn rare new limited-edition rewards from creatures and chests in Southsun Cove, and by playing Crab Toss.
  
• Exclusive Southsun Items: Players who help keep the peace during the Secret of Southsun can earn two exclusive new back items, the floral Fervid Censer and the writhing Sclerite Karka Shell.

It won’t end in a dungeon. We have however included an instance that will open up that has a single player version, and a more difficult multiplayer version.

The ending is different [Source]

• Fixed the Heralds so they will tell the tale of Southsun Cove.
  
• Fixed a bug causing waypoints on Southsun Shore to remain locked when they shouldn’t be.
  
• Fixed issues that were potential causes of server latency in Crab Toss.
  
• Fixed Cragstead and North Nolan Hatchery to appear in their post-Flame and Frost states.
  
• Flame and Frost’s Victory Bonfires in Lion’s Arch, Hoelbrak & Black Citadel will remain until May 28th. Interacting with them will allow A Rallying Flame to be completed.
  
• Fixed a bug with Dodge roll where it could get stuck in the queue and unintentionally execute after a stun or immobilize.
  
• Collision has been updated on the World vs. World Burning Oil Pot. Players will once again be able to burn the enemies at the gate.
  
• Fixed a bug with the animation with Sclerite Karka Shell.
  
• Fixed a bug with missing upgrade slots on PvP Sclerite weapons.

[source]

• The Consortium has created a new exotic resort for those looking to get away for a while. Lord Faren and Lady Kasmeer are currently there on vacation.
  
• New settlements have been created for refugees coming in from Lion’s Arch.
  
• Animals on Southsun Cove are becoming increasingly aggressive.
  
• Settlers and tourists have wandered too far from the camps and need assistance getting back to safety.
  
• Researcher Levvi is looking for brave adventurers to help survey the island and recover samples to determine the cause of the native creatures’ increased aggression.
  
• Tensions between settlers and Consortium members have led to confrontation that may require mediation.
  
• The new Crab Toss activity is now available at Sawtooth Bay in Southsun Cove. Players can win karka shells, passiflora, tonics, and more.
  
• Southsun Supply Crates will drop rarely from creatures during the Secret of Southsun event. These crates contain Southsun crafting materials and a chance at a wide variety of items, such as shoulder skins, new boosts and convenience items, and a rare chance at new weapon skins and minis. Southsun Supply Crates can also be purchased from the Black Lion Trading Company (see below for more info).
  
• Blooming Passiflora are now growing on the island.
  
• The larger veteran and champion karka now have a guaranteed drop chance for karka shells upon defeat.
  
• All players who enter the island for the duration of the event are scaled up to level 80. This content is available from May 14 to June 11.

• Six Guild Trek locations have been added to Southsun Cove.

• Added new living world achievements to Southsun Cove: “Consortium Rewards Club Member,” “Southsun Settler Supporter,” “Southsun Sightseer,” “Southsun Volunteer Fieldwork,” “Southsun VIP Meet and Greet,” and more.
  
• Added new achievements for Crab Toss activity: “Crab Toss Participant,” “Crab-Carrying Competitor,” “Crabtacular!,” “Crabgrabber,” and “Crab Toss Champion.”
  
• Players who complete 25 of the Secret of Southsun achievements will earn the “Southsun Stalwart” meta-achievement. This achievement awards players with a Sclerite Karka Shell back item and the title of “Southsun Stalwart.” The Southsun Stalwart meta-achievement covers the entire event’s content, some of which is not accessible until the next release.
  
• A new title, “Crab Toss Champion,” has been added for players who win a game of Crab Toss.
  
• A new title, “Crabgrabber,” has been added for players who steal 100 crabs during games of Crab Toss.

• Obsidian Sanctum, the jumping puzzle in the Eternal Battlegrounds, has been moved to its own WvW map.
  
  • Entering the puzzle will take players out of the Eternal Battlegrounds.
    
  • Leaving will take players back to Lion’s Arch.
• Added a new vendor: “Traps and Tricks Outfitter.”
  
• Traps have been added as a new purchasable consumable utility item. Two unique variants are available.
  
  • When placed, traps last for one hour.
    
  • Players may only have one of a given trap type deployed at a time.
    
  • Traps will disappear when a player leaves the map.
    
  • Traps are sold by the vendor for 15 badges and 525 karma; they will stack to 250 and are account-bound.
    
  • It takes a 4-second channel to place at feet.
    
  • Placing a trap uses very short-range ground targeting to assist in orientation.
    
  • Placed traps have a 600×90 rectangular trigger area; only enemies can trigger them.
    
  • Once triggered, traps affect up to 20 enemies within a range of 1200.
    
  • Traps cost 10 supply to place.
• Supply Removal Trap
  
  • Removes 5 supply from enemies affected by the trap.
• Stealth Disruptor Trap
  
  • Removes stealth from enemies and reveals them for 30 seconds, preventing stealth.

• A Commander’s map pings and strokes are now visible to members of their squad.
  
• Fixed several shadowstep bugs that let players teleport through WvW gates and exploit various dungeons.
  
• Fixed a bug that caused some items to lose their functionality after a player has gone into a downed state.

• Malchor’s Leap:
  
  • Pact cannons near the Shelter Docks are now fully operational.
    
  • The Inquest Ornithologist has been upgraded to a champion, as befits her Group Event status.
• Metrica Province:
  
  • Minor UI changes were made to the Mark II golem event.
• Mount Maelstrom:
  
  • The Branded ogre in the Infinity Coil complex is now properly imprisoned in his cage.
• Sparkfly Fen:
  
  • Added a skill to the seaweed-mine bundle.
• Timberline Falls:
  
  • Fixed a stalling bug in the event “Protect krewe leader Dobbs as the krewe clears the excavation site.”
• Wayfarer Foothills:
  
  • Dredge soldiers outside Molensk are no longer rooted in place.

• “Down the Hatch”:
  
  • Fixed a rare stalling bug at the end of the story step.
• “The Ghost Rite”:
  
  • Fixed the player’s camera position while transformed.

• Reverted a change to PvP dailies that increased their difficulty.
  
• Reworded some custom arena tooltips to be less confusing.

Elementalist

• Dragon’s Claw:
  
  • Fixed an exploit that caused this skill to fire at increased rates.
• Shocking Aura:
  
  • This skill’s icon on the buff bar now displays the same icon as the skill itself.

Engineer

• Kit Refinement:
  
  • The cooldown icon will now display correctly when this trait is used with Flamethrower.

Ranger

• Fixed a bug that caused the projectile speed of the following axe skills to be 75% of their intended speed:
  
  • Ricochet
    
  • Splitblade
    
  • Winter’s Bite
    
  • Path of Scars
• Juvenile Rainbow Jellyfish now uses a unique model.

Warrior

• Leg Specialist:
  
  • This trait will no longer function with the Burning Oil siege weapon in WvW.
• Healing Signet:
  
  • Updated skill facts to show the passive effect and accurately display the healing value for the active effect.

• You can now purchase the Southsun Supply Crate in the Consumable category of the Gem Store for 1 for 150 gems or 10 for 1200 gems. These special crates contain Southsun crafting materials and a chance at items such as shoulder skins, new boosts and convenience items, and a rare chance at new weapon skins and minis. The Southsun Supply Crates will only be available until June 10. The Southsun Supply Crates will also be a limited-time rare drop off the creatures on the island during this time.
  
• The Consortium Swim Speed Boost is now available in the Boost category of the Gem Store for 1 for 50 gems or 5 for 200 gems. This boost will increase your swim speed by 15% for 1 hour. This boost is not useable in PvP.
  
• To celebrate spring, the Gem Store is making one miniature baby animal available each week for the month of May. This week’s adorable addition is the Mini Moa Chick, which is now available in the Minis category of the Gem Store for 400 gems each.
  
• How to Dance, Volume 1 is now available in the Services category of the Gem Store for 400 gems. This book can be used to gain access to three different dance moves and a skill that will allow you to invite others to participate in your dance party.

• We’re rolling out our first set of optimizations. This is the first in many steps involved in helping resolve issues with “skill lag.” Some players will experience a slight improvement in skill lag issues with large groups of players, while some players may also experience a slight raise in their FPS.

Engineer

• Fixed a bug which disabled certain traits from functioning correctly. This includes Rifled Turret Barrels, Metal Plating, and Autotool Installation.

• Arrow Cart: Arrow cart damage vs. other siege weapons has been reduced to 50% of its current damage.

• Fused weapon tickets are no longer available in Black Lion Chests.
  
• Citizens! The Shark Boss crier will no longer be a bother. Please excuse his bad behavior.
  
• Prevented Levvi from getting killed and temporarily blocking the scavenger hunt on Southsun Cove.
  
• Fixed an issue with crab toss where players would get stuck on a team reserved for those carrying the crab.
  
• This subsequently fixes an issue where more than one player wins, but the winner does not get a winner’s prize.
  
• This also fixes an issue with the achievement for winning Crab Toss.
  
• Closed an exploit that allowed some players to still access the final molten dungeon instance.