[Update]: Sky Pirates has now arrived alongside an assortment of fancy new weapon skins.
In an effort to bring back all of the Living World Season 1 content after a decade of absence, the Guild Wars 2 team has now started re-releasing updated versions of the original episodes. The very first one Flame and Frost has already arrived, and on May 24th the Sky Pirates episode will bring with it the long-lost continuation of the story and a reintroduction to Captain Mai Trin and detective Marjory Delaqua.
Much like its predecessor, Sky Pirates will be a permanent addition that's freely available to all players. So regardless of what expansions you may or may not own, you'll be able to play through the old storylines at your leisure.
If you're looking for something a bit more meaty to sink your teeth into, you might be happy to hear that Sky Pirates will also bring with it a brand new Challenge Mode Strike mission, as well as a set of Generation 3 legendary weapon variants themed after the Elder Dragon of death and shadow, Zhaitan. The exact details are still few and far between, but considering the previous developer update, it's highly likely the new legendary variants will be unlocked through some sort of lengthy quest.
Once we get the actual details, most likely once the update itself goes live, I'll make sure to let you know. Until then, make sure to give Flame and Frost a try if you're in the mood for some nostalgia. Enjoy!