Re: Death Star Assault !
Yeah, you're going to need to cite your source on that one.
From what is known, the campaign appears to be set right after the Battle of Endor, and appears to be concerned with protecting the development of the Starhawk Class Battlecruiser that were instrumental during the Battle of Jakku (kind of hoping this might be the end point of the campaign).
Granted there's not much known, but there's absolutely no indication that it starts after the destruction of Alderaan.