The game's website gives a rundown of the basic premise of some of the launch game's battles, presumably for the Galactic Assault game mode. They don't tell us much regarding objectives, but they tell us more than we knew before. Also, I'm assuming that this list is incomplete, because we saw Ryloth and the Unknown Regions listed in that trailer that aren't up on the website (yet?). Although, if they are Starfighter Assault-exclusive, that might explain the absence.
Prequel maps:
The Separatists on all three maps will, it seems, be the default attacking force, while the Republic Clones will be defending on all three worlds. A few Republic assault maps in the DLC would be great.
Original trilogy maps:
Looks like the Empire has three maps wherein it is the attacking force, and two where they must defend their positions. Not so bad.
Sequel maps:
Looks like two maps where the First Order is on the offense, to the Resistance's one assault.
https://www.ea.com/games/starwars/battl ... layer/mapsSo many worlds not yet included, so much DLC to come. God only knows how many GB they'll all take up.