Microsoft has announced that Sea of Thieves will be expanding in earlyish 2019 with the release of The Arena, a new PvP experience for the busy pirate with a bone to pick. During gameplay, pirates will set sail to hunt down treasure in a location that will pretty much force combat with other players.
Other features of The Arena (via Polygon):
- a tavern to meet up with others interested in The Arena combat
- Sea Dogs faction
- a new trading company
- queue on demand