Personaly I'm hoping for vast improvements and content restoration of BG3, which would naturally lead up to the Definitive Edition of it. They've done a fantastic job, but they've also unfortunately rushed it, so would love to see it filled with in-depth content as it should be.
After that I'm up for whatever they have in store, whether it's more BG3 or a new BG game or DOS3. Love Larian games a lot so I'm up for whatever, just keep'em coming.