Sea of Thieves is supposedly Rare's return to form after being locked in a Kinect dungeon for years.
We got a great little look at it today at Microsoft's conference as well. There was a little cinematics trailer to show you the breadth of things you'll be doing. Take a look:
And to go with it, there was a gameplay debut that was supposedly conducted by the Sea of Thieves "Community". It looks colorful, and the Pirate co-op play is a really neat idea. Hell, they ever got a bit drunk. This looks like a lot of fun.