I didn't find out about this game until today - the sequel to 2014's Shadow of Mordor - but I figured I'd start the hype here since I know the original game had a lot of fans on this forum.
Looks like you'll have more control of an actual army and lay siege to strongholds, and then build up their fortifications once you've taken over. It also seems like you can travel to more and bigger fortresses, maybe even Minas Tirith. All in all the locations look a lot more varied than they did in the original game, which is really nice. And holy fuck, there's gonna be dragons and balrogs!? This looks incredible.