In a recent investor call they said that Battlefront 2 will be "much bigger". I guess they mean content wise?
Hopefully, I have put a lot of hours into Battlefront, but a most of those were spent in the DLC. I kinda get the impression Battlefront 2 will directly tackle a lot of the criticisms of the first game, namely:
No single player campaign.
Limited map variety in base game.
Small amount of game modes (basically Extraction and Sabotage are awesome and should have been in the base game).
Progression and levelling depth.
Physical vehicles on maps.
I also hope they add:
Somesort of conquest mode.
Greater variety of heroes and villains.
Ground to space combat (basically I wanna see a Walker Assault type game but in space, where the Death Star takes the place of the AT-AT. You could have some people on the ground storming shield generators on Endor, Stormtroopers trying to defend it. Once the shield is down, you could jump into a ship and fly up and do a trench run. Also, an inter-ship capture the flag mode).