The leak came from Google's online gaming service Stadia, which listed the game as one of several titles due for release on the platform in 2020. Although Stadia have withdrawn the announcement, the Internet of course never forgets.
Larian Studios have previously confirmed that there will be a big announcement related to the game on 27 February, which many have taken as likely when a release date will be announced, possibly along with a new trailer and more information on gameplay.
Relatively little is known about the game so far, except that it is a follow-up to the previous games in the series: Baldur's Gate (1998), Tales of the Sword Coast (1999), Baldur's Gate II: Shadows of Amn (2000) and Throne of Bhaal (2001). The game will not directly follow up the storyline of those games, instead beginning a new story in the city of Baldur's Gate some 120 years after the events of the previous titles. The game will be party-based and will utilise the Dungeons & Dragons 5th Edition rules. It is presumed, but not confirmed, that the game will use the same engine which drove Larian's own original RPGs, Divinity: Original Sin and Divinity: Original Sin II, and will be viewed from overhead. Other details, such as whether it will have real-time combat like the original games or turn-based like the Divinity series, remain unknown as this time.