1916 was certainly one of the more interesting years of the war. There was Jutland, the Brusilov Offensive, the Somme (which also saw the first deployment of the tank), Gallipoli and several other battles and sieges. Not to mention the fact that Italy, Romania and Bulgaria entered into the war on that year.
That said, I wouldn't mind if the module was set during mid-to-late 1917; it'd certainly allow room for our American compatriots, as well as the Battle of Passchendaele.