At a preview event for Battlefield 1's first expansion, They Shall Not Pass, EA showed off sneak peek details regarding the rest of their DLC content as well. Key among those details for a site called AusGamers — news of a Gallipoli Beach Landing coming to the third expansion, titled "Turning Tides".
This heavily implies — though does not confirm — the idea that ANZACs will feature as an army force by the time the third expansion rolls around. Previously members of DICE have been extremely coy when questioned about the addition of Aussie and New Zealand armed forces in multiplayer. The French army has been added to They Shall Not Pass — the first expansion pack — and the expansion itself revolves around French engagements. Turning Tides focuses on Naval battles, so there is a possibility the ANZACs don't get a good look in — but there'd be a whole mess of upset Aussies (and characteristically easy going Kiwis) if the Gallipoli Campaign didn't feature diggers.
The second expansion "In the Name of the Tsar" will focus on the Eastern European Light Cavalry known as the Hussars, and promises expanded horseplay, and the fourth expansion "Apocalypse" wasn't detailed much, but will almost definitely have nothing to do with a blue dude mumbling his way through the second worst X-Men movie.
Other news out of the preview event includes the fact that prominent Battlefield playing Youtubers prefer to go for kills instead of playing the fucking objective, as evidenced by the following screenshot. Meanwhile, you can read my thoughts about the new Frontlines mode now