From ArenaNet:
We've reached a crossroads in Guild Wars 2: Heart of Thorns Living World Season 3. "Flashpoint," the last episode before the season finale, will be live in-game on Tuesday, May 2. "Flashpoint" finds the forces of good fighting a battle on two fronts. The fight against the now more powerful Elder Dragons seemingly has turned in their favor with news that Taimi's research has resulted in a machine that can stop them with a single decisive blow. Meanwhile, the powerful mursaat Lazarus – who returned mysteriously purporting to be an ally - has been revealed to be an imposter. Marjory Delaqua attached herself to him to investigate and is now headed back to Rata Novus without discovering much about the truth of his identity. Both paths converge as Lazarus is on his way for a confrontation; in "Flashpoint," players will uncover shocking secrets and come face-to-face with a threat unlike any they've seen before.
"Flashpoint" represents the perfect time to jump into Heart of Thorns, as ArenaNet has now permanently reduced the price of the game! Starting today, all editions of the game have been lowered by $20 apiece; this means that the Standard Edition will now cost $29.99 (down from $49.99), the Digital Deluxe Edition is now $54.99 (down from $74.99), and the Ultimate Edition is now $79.99 (down from $99.99). More information on pricing for other currencies can be found here.
To access new Living World episodes, players must own Guild Wars 2: Heart of Thorns; by simply logging in, they can bank episodes to play later. They don't need to have completed the storyline in the expansion to enjoy Season 3. Season 3 content is intended for level-80 characters. Every purchase of Guild Wars 2: Heart of Thorns comes with a Level-80 Boost, which will boost one character to max level and equip them to enjoy all the content available in Guild Wars 2, including Season 3.
A brand-new teaser trailer can be viewed on YouTube below.