they say the Death Star is like every other unit, it can move around and position itself on the map, so if its in scale size (hopefully) the closer it gets to ships the larger it looks untill it gets very close and you can use its surface cannons on the enemy ships and then you have an instant surface battle. Also I think that the trench run will be ingame, it would be dissapointing to only have a cutscene for it, maybe you can only send fighters in to do the trench run and it will take 3 or 4 minutes for the fighters to make it through the trench and while there in the trench you can send ties after them to try to stop them from acomplishing there goal