New IP by Obsidian, releasing Spring 2020 on Xbox One, multiplayer survival game where you're real tiny (shrunken). Post more info when it's live.
EDIT: lol my freudian slip, but the title is fix'd now.
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UPDATE: Some info from The Verge: https://www.theverge.com/2019/11/14/20964550/obsidian-grounded-survival-game-microsoft-xbox-xo19
Obsidian is a studio best-known for deep, intriguing role-playing games like Fallout: New Vegas and, most recently, The Outer Worlds. But the studio's next release moves in a completely different direction. At X019 in London, Obsidian revealed Grounded, a survival game set in a suburban backyard where a group of four friends has to fend for themselves after being shrunk down to the size of an ant. "It's a little different than what you're used to seeing from Obsidian," says director Adam Brennecke.
Grounded, which is the first new property from Obsidian since the studio was acquired by Microsoft, is a four-player co-op experience that can be played in both first- and third-person. Like most survival games, you'll build a base, craft gear, gather resources, and hunt and cook food. What Obsidian hopes will make the game stand out is the setting.
The game has a very Honey, I Shrunk the Kids vibe. The four main characters were all shrunken as part of an experiment and are now forced to survive the untamed wilds that are actually a standard American suburban backyard. Seen from this new perspective, things feel very different: bugs become giant monsters, while a simple baseball is a huge structure. A patch of grass is a forest to traverse, and weedkiller turns an area into a toxic zone.
More at the link.