Don't Expect a Tiny Download
When Outer Rim arrived in March, it required Battlefront owners to download an 8GB update. A mandatory 8GB update.
Everyone, not just Season Pass holders, was required to download Outer Rim's client-side update. Remember, Battlefront Outer Rim DLC owners can use Outer Rim content in games with people that don't own the DLC expansion.
This Outer Rim update was substantial for DLC owners and everyone else and we expect similar from the Bespin DLC.
Don't be surprised if there is a sizable, mandatory download when the Bespin DLC arrives. It's impossible to say how big the DLC update might be but it's fair to assume that Bespin will probably be as big as Outer Rim.