https://www.polygon.com/2018/5/23/17382404/sea-of-thieves-hungering-deep-round-up-expansion

Sea of Thieves fans have been aching for content, and the upcoming Hungering Deep expansion promises to deliver the first of three announced DLC packs. The Hungering Deep will hit on May 29th, and it will be followed by Cursed Sails, Forsaken Shores and weekly events. All content updates will be available for no additional cost, and we know that they bring new PVE mechanics that require cooperation but, other than that, we’re still largely in the dark

With less than a week to go until the expansion hits, the developers have revealed some more information. Executive Producer Joe Neate returned to the most recent Developer Update to share quality of life updates, information on delayed features, and confirmed that there will be a pioneer program to test new features before they hit live.