If you're nearing the end of Batman: Arkham Knight , you can always spring for the downloadable content. Warner Bros. has released a full trailer for the first expansion, A Matter of Family, which features Batgirl. This DLC will launch…

If you've been enjoying the excellent Batman: Arkham Knight , you'll be happy to learn that the first story-based DLC isn't far off. Publisher Warner Bros. has announced a July 14 release date for this first expansion, which will focus…