Larian is teasing something with a 3 in it - and it looks like Baldur's Gate 3.
The Larian homepage has the number 3 emblazoned on it. The first thought this conjures is Divinity: Original Sin 3, although it feels a little early for that game. But someone had a dig around the code underpinning Larian's website, and it very much looks like this tease relates to Baldur's Gate 3 instead.
Twitter user kunkken went down the HTML rabbit hole and unearthed Baldur's Gate and Forgotten Realms licence holder Wizards of the Coast, which make this one something of a sure bet.