Well the next two games will be the already announced Fallen Heroes which will bridge the gap between Original Sin 2 and the Dragon Knight Saga - well it will fit into the timeline at that point anyway. Fallen Heroes looks like it follows on from one of the endings of Original Sin 2 so that it would fit in with the backstory of DKS but having said that the events of Fallen Heroes plot could change DKS's backstory or even make the events of DKS impossible therefore retconning DKS out of the storyline altogether. I hope that's not the case but Larian's other game is not Divinity 3 / Dragon Knight Saga 2 which brings me on to the second point.
The other game that Larian is working on is not a Divinity game at all; in fact it looks like it will be Baldurs Gate 3 due to Larian purchasing the licence to the franchise some time back. Also the clue is in the metadata embedded in the video on Larian's front page. We will find out at E3 later this month.
So as for a Dragon Knight Saga sequel, this depends on what happens during Fallen Heroes but if any 'sequel' is released it will be a few years yet & it's likely to be called Original Sin 3 set after the events of DKS which will be explained in Original Sin 3's backstory.
Last edited by Arokh; 01/06/19 12:30 PM.