As a fellow Australian I believe that adding an ANZAC faction would be something different and showing the Aussies involvement in WW1.
A map like Gallipoli is rugged and diverse wherever you go and between 1915 and 1916 it was a complete standstill and neither the Turks or the ANZACs were able to gain ground. Maybe this could consider a new game mode. A over the top rush and trench raiding mode where a whistle is blown by a captain or whoever is commanding the trench. This would also mean the Turkish Faction to be added. I am sure with time and dedication, the Gallipoli map and both the ANZAC and the Turkish factions can become reality.
Thanks Redstone for an amazing game.