During today's quarterly investor call, EA teased what it called the "richest Battlefield experience" yet. Which is the kind of verbiage you expect of an investor call. A great sound byte that tells you absolutely nothing, but hints at the promise of future profits.
EA's CEO Andrew Wilson said the new content will premier at Gamescom next month and includes new maps and modes. And the content is not coming from the In the Name of the Tsar DLC, which was revealed at E3. While that would have been a good guess, EA specified during the question and answer period of the call that the new addition to Battlefield 1 is in fact an eSports mode. They referenced the difficulties playing competitive matches with 64 players as part of their reasoning for the new mode.
While we don't have a lot of information on the new mode yet, the details will be revealed during Gamescom.
So we have at least two big Battlefield announcements to come, which will probably take up most of EA's Gamescom announcements.