In a recent Tweet, EA responded to a question regarding new content for Star Wars Battlefront, not surprisingly the answer they gave was a resounding ‘Nope’
@Gamemaster6481 There are currently no plans to add any new content updates to Star Wars Battlefront.
— EAStarWars (@EAStarWars) February 15, 2017
This doesn’t really come as much of a surprise, with Battlefront 2 set to be released later this year, EA will be focusing all their time and energy on getting that ready for release. This isn’t to say that no new content will be available in the future as EA often release new updates for older games.