It seems like Divinity Xcom mode? A series of combat missions involving the six characters from OS2, split up with decisions/narrative that will change up the storyline and the missions in some way.
I would have preferred a full RPG like OS2, but this is a side project by another team working off'ff the OS2 engine, so it's safe to assume Larian's got something else in the works at the moment. In any case, it's Larian-approved and based on OS2 so it's pretty much an autobuy for me
